diff options
Diffstat (limited to 'fs/reiserfs/stree.c')
-rw-r--r-- | fs/reiserfs/stree.c | 3369 |
1 files changed, 1743 insertions, 1626 deletions
diff --git a/fs/reiserfs/stree.c b/fs/reiserfs/stree.c index 63158491e152..e2d08d7bcffc 100644 --- a/fs/reiserfs/stree.c +++ b/fs/reiserfs/stree.c | |||
@@ -59,46 +59,45 @@ | |||
59 | #include <linux/quotaops.h> | 59 | #include <linux/quotaops.h> |
60 | 60 | ||
61 | /* Does the buffer contain a disk block which is in the tree. */ | 61 | /* Does the buffer contain a disk block which is in the tree. */ |
62 | inline int B_IS_IN_TREE (const struct buffer_head * p_s_bh) | 62 | inline int B_IS_IN_TREE(const struct buffer_head *p_s_bh) |
63 | { | 63 | { |
64 | 64 | ||
65 | RFALSE( B_LEVEL (p_s_bh) > MAX_HEIGHT, | 65 | RFALSE(B_LEVEL(p_s_bh) > MAX_HEIGHT, |
66 | "PAP-1010: block (%b) has too big level (%z)", p_s_bh, p_s_bh); | 66 | "PAP-1010: block (%b) has too big level (%z)", p_s_bh, p_s_bh); |
67 | 67 | ||
68 | return ( B_LEVEL (p_s_bh) != FREE_LEVEL ); | 68 | return (B_LEVEL(p_s_bh) != FREE_LEVEL); |
69 | } | 69 | } |
70 | 70 | ||
71 | // | 71 | // |
72 | // to gets item head in le form | 72 | // to gets item head in le form |
73 | // | 73 | // |
74 | inline void copy_item_head(struct item_head * p_v_to, | 74 | inline void copy_item_head(struct item_head *p_v_to, |
75 | const struct item_head * p_v_from) | 75 | const struct item_head *p_v_from) |
76 | { | 76 | { |
77 | memcpy (p_v_to, p_v_from, IH_SIZE); | 77 | memcpy(p_v_to, p_v_from, IH_SIZE); |
78 | } | 78 | } |
79 | 79 | ||
80 | |||
81 | /* k1 is pointer to on-disk structure which is stored in little-endian | 80 | /* k1 is pointer to on-disk structure which is stored in little-endian |
82 | form. k2 is pointer to cpu variable. For key of items of the same | 81 | form. k2 is pointer to cpu variable. For key of items of the same |
83 | object this returns 0. | 82 | object this returns 0. |
84 | Returns: -1 if key1 < key2 | 83 | Returns: -1 if key1 < key2 |
85 | 0 if key1 == key2 | 84 | 0 if key1 == key2 |
86 | 1 if key1 > key2 */ | 85 | 1 if key1 > key2 */ |
87 | inline int comp_short_keys (const struct reiserfs_key * le_key, | 86 | inline int comp_short_keys(const struct reiserfs_key *le_key, |
88 | const struct cpu_key * cpu_key) | 87 | const struct cpu_key *cpu_key) |
89 | { | 88 | { |
90 | __u32 n; | 89 | __u32 n; |
91 | n = le32_to_cpu(le_key->k_dir_id); | 90 | n = le32_to_cpu(le_key->k_dir_id); |
92 | if (n < cpu_key->on_disk_key.k_dir_id) | 91 | if (n < cpu_key->on_disk_key.k_dir_id) |
93 | return -1; | 92 | return -1; |
94 | if (n > cpu_key->on_disk_key.k_dir_id) | 93 | if (n > cpu_key->on_disk_key.k_dir_id) |
95 | return 1; | 94 | return 1; |
96 | n = le32_to_cpu(le_key->k_objectid); | 95 | n = le32_to_cpu(le_key->k_objectid); |
97 | if (n < cpu_key->on_disk_key.k_objectid) | 96 | if (n < cpu_key->on_disk_key.k_objectid) |
98 | return -1; | 97 | return -1; |
99 | if (n > cpu_key->on_disk_key.k_objectid) | 98 | if (n > cpu_key->on_disk_key.k_objectid) |
100 | return 1; | 99 | return 1; |
101 | return 0; | 100 | return 0; |
102 | } | 101 | } |
103 | 102 | ||
104 | /* k1 is pointer to on-disk structure which is stored in little-endian | 103 | /* k1 is pointer to on-disk structure which is stored in little-endian |
@@ -106,68 +105,72 @@ inline int comp_short_keys (const struct reiserfs_key * le_key, | |||
106 | Compare keys using all 4 key fields. | 105 | Compare keys using all 4 key fields. |
107 | Returns: -1 if key1 < key2 0 | 106 | Returns: -1 if key1 < key2 0 |
108 | if key1 = key2 1 if key1 > key2 */ | 107 | if key1 = key2 1 if key1 > key2 */ |
109 | static inline int comp_keys (const struct reiserfs_key * le_key, const struct cpu_key * cpu_key) | 108 | static inline int comp_keys(const struct reiserfs_key *le_key, |
109 | const struct cpu_key *cpu_key) | ||
110 | { | 110 | { |
111 | int retval; | 111 | int retval; |
112 | 112 | ||
113 | retval = comp_short_keys (le_key, cpu_key); | 113 | retval = comp_short_keys(le_key, cpu_key); |
114 | if (retval) | 114 | if (retval) |
115 | return retval; | 115 | return retval; |
116 | if (le_key_k_offset (le_key_version(le_key), le_key) < cpu_key_k_offset (cpu_key)) | 116 | if (le_key_k_offset(le_key_version(le_key), le_key) < |
117 | return -1; | 117 | cpu_key_k_offset(cpu_key)) |
118 | if (le_key_k_offset (le_key_version(le_key), le_key) > cpu_key_k_offset (cpu_key)) | 118 | return -1; |
119 | return 1; | 119 | if (le_key_k_offset(le_key_version(le_key), le_key) > |
120 | 120 | cpu_key_k_offset(cpu_key)) | |
121 | if (cpu_key->key_length == 3) | 121 | return 1; |
122 | return 0; | 122 | |
123 | 123 | if (cpu_key->key_length == 3) | |
124 | /* this part is needed only when tail conversion is in progress */ | 124 | return 0; |
125 | if (le_key_k_type (le_key_version(le_key), le_key) < cpu_key_k_type (cpu_key)) | 125 | |
126 | return -1; | 126 | /* this part is needed only when tail conversion is in progress */ |
127 | if (le_key_k_type(le_key_version(le_key), le_key) < | ||
128 | cpu_key_k_type(cpu_key)) | ||
129 | return -1; | ||
130 | |||
131 | if (le_key_k_type(le_key_version(le_key), le_key) > | ||
132 | cpu_key_k_type(cpu_key)) | ||
133 | return 1; | ||
127 | 134 | ||
128 | if (le_key_k_type (le_key_version(le_key), le_key) > cpu_key_k_type (cpu_key)) | 135 | return 0; |
129 | return 1; | ||
130 | |||
131 | return 0; | ||
132 | } | 136 | } |
133 | 137 | ||
134 | 138 | inline int comp_short_le_keys(const struct reiserfs_key *key1, | |
135 | inline int comp_short_le_keys (const struct reiserfs_key * key1, const struct reiserfs_key * key2) | 139 | const struct reiserfs_key *key2) |
136 | { | 140 | { |
137 | __u32 * p_s_1_u32, * p_s_2_u32; | 141 | __u32 *p_s_1_u32, *p_s_2_u32; |
138 | int n_key_length = REISERFS_SHORT_KEY_LEN; | 142 | int n_key_length = REISERFS_SHORT_KEY_LEN; |
139 | 143 | ||
140 | p_s_1_u32 = (__u32 *)key1; | 144 | p_s_1_u32 = (__u32 *) key1; |
141 | p_s_2_u32 = (__u32 *)key2; | 145 | p_s_2_u32 = (__u32 *) key2; |
142 | for( ; n_key_length--; ++p_s_1_u32, ++p_s_2_u32 ) { | 146 | for (; n_key_length--; ++p_s_1_u32, ++p_s_2_u32) { |
143 | if ( le32_to_cpu (*p_s_1_u32) < le32_to_cpu (*p_s_2_u32) ) | 147 | if (le32_to_cpu(*p_s_1_u32) < le32_to_cpu(*p_s_2_u32)) |
144 | return -1; | 148 | return -1; |
145 | if ( le32_to_cpu (*p_s_1_u32) > le32_to_cpu (*p_s_2_u32) ) | 149 | if (le32_to_cpu(*p_s_1_u32) > le32_to_cpu(*p_s_2_u32)) |
146 | return 1; | 150 | return 1; |
147 | } | 151 | } |
148 | return 0; | 152 | return 0; |
149 | } | 153 | } |
150 | 154 | ||
151 | inline void le_key2cpu_key (struct cpu_key * to, const struct reiserfs_key * from) | 155 | inline void le_key2cpu_key(struct cpu_key *to, const struct reiserfs_key *from) |
152 | { | 156 | { |
153 | int version; | 157 | int version; |
154 | to->on_disk_key.k_dir_id = le32_to_cpu (from->k_dir_id); | 158 | to->on_disk_key.k_dir_id = le32_to_cpu(from->k_dir_id); |
155 | to->on_disk_key.k_objectid = le32_to_cpu (from->k_objectid); | 159 | to->on_disk_key.k_objectid = le32_to_cpu(from->k_objectid); |
156 | 160 | ||
157 | // find out version of the key | 161 | // find out version of the key |
158 | version = le_key_version (from); | 162 | version = le_key_version(from); |
159 | to->version = version; | 163 | to->version = version; |
160 | to->on_disk_key.k_offset = le_key_k_offset(version, from); | 164 | to->on_disk_key.k_offset = le_key_k_offset(version, from); |
161 | to->on_disk_key.k_type = le_key_k_type(version, from); | 165 | to->on_disk_key.k_type = le_key_k_type(version, from); |
162 | } | 166 | } |
163 | 167 | ||
164 | |||
165 | |||
166 | // this does not say which one is bigger, it only returns 1 if keys | 168 | // this does not say which one is bigger, it only returns 1 if keys |
167 | // are not equal, 0 otherwise | 169 | // are not equal, 0 otherwise |
168 | inline int comp_le_keys (const struct reiserfs_key * k1, const struct reiserfs_key * k2) | 170 | inline int comp_le_keys(const struct reiserfs_key *k1, |
171 | const struct reiserfs_key *k2) | ||
169 | { | 172 | { |
170 | return memcmp (k1, k2, sizeof (struct reiserfs_key)); | 173 | return memcmp(k1, k2, sizeof(struct reiserfs_key)); |
171 | } | 174 | } |
172 | 175 | ||
173 | /************************************************************************** | 176 | /************************************************************************** |
@@ -184,373 +187,396 @@ inline int comp_le_keys (const struct reiserfs_key * k1, const struct reiserfs_k | |||
184 | there are no possible items, and we have not found it. With each examination we | 187 | there are no possible items, and we have not found it. With each examination we |
185 | cut the number of possible items it could be by one more than half rounded down, | 188 | cut the number of possible items it could be by one more than half rounded down, |
186 | or we find it. */ | 189 | or we find it. */ |
187 | static inline int bin_search ( | 190 | static inline int bin_search(const void *p_v_key, /* Key to search for. */ |
188 | const void * p_v_key, /* Key to search for. */ | 191 | const void *p_v_base, /* First item in the array. */ |
189 | const void * p_v_base,/* First item in the array. */ | 192 | int p_n_num, /* Number of items in the array. */ |
190 | int p_n_num, /* Number of items in the array. */ | 193 | int p_n_width, /* Item size in the array. |
191 | int p_n_width, /* Item size in the array. | 194 | searched. Lest the reader be |
192 | searched. Lest the reader be | 195 | confused, note that this is crafted |
193 | confused, note that this is crafted | 196 | as a general function, and when it |
194 | as a general function, and when it | 197 | is applied specifically to the array |
195 | is applied specifically to the array | 198 | of item headers in a node, p_n_width |
196 | of item headers in a node, p_n_width | 199 | is actually the item header size not |
197 | is actually the item header size not | 200 | the item size. */ |
198 | the item size. */ | 201 | int *p_n_pos /* Number of the searched for element. */ |
199 | int * p_n_pos /* Number of the searched for element. */ | 202 | ) |
200 | ) { | 203 | { |
201 | int n_rbound, n_lbound, n_j; | 204 | int n_rbound, n_lbound, n_j; |
202 | 205 | ||
203 | for ( n_j = ((n_rbound = p_n_num - 1) + (n_lbound = 0))/2; n_lbound <= n_rbound; n_j = (n_rbound + n_lbound)/2 ) | 206 | for (n_j = ((n_rbound = p_n_num - 1) + (n_lbound = 0)) / 2; |
204 | switch( comp_keys((struct reiserfs_key *)((char * )p_v_base + n_j * p_n_width), (struct cpu_key *)p_v_key) ) { | 207 | n_lbound <= n_rbound; n_j = (n_rbound + n_lbound) / 2) |
205 | case -1: n_lbound = n_j + 1; continue; | 208 | switch (comp_keys |
206 | case 1: n_rbound = n_j - 1; continue; | 209 | ((struct reiserfs_key *)((char *)p_v_base + |
207 | case 0: *p_n_pos = n_j; return ITEM_FOUND; /* Key found in the array. */ | 210 | n_j * p_n_width), |
208 | } | 211 | (struct cpu_key *)p_v_key)) { |
209 | 212 | case -1: | |
210 | /* bin_search did not find given key, it returns position of key, | 213 | n_lbound = n_j + 1; |
211 | that is minimal and greater than the given one. */ | 214 | continue; |
212 | *p_n_pos = n_lbound; | 215 | case 1: |
213 | return ITEM_NOT_FOUND; | 216 | n_rbound = n_j - 1; |
217 | continue; | ||
218 | case 0: | ||
219 | *p_n_pos = n_j; | ||
220 | return ITEM_FOUND; /* Key found in the array. */ | ||
221 | } | ||
222 | |||
223 | /* bin_search did not find given key, it returns position of key, | ||
224 | that is minimal and greater than the given one. */ | ||
225 | *p_n_pos = n_lbound; | ||
226 | return ITEM_NOT_FOUND; | ||
214 | } | 227 | } |
215 | 228 | ||
216 | #ifdef CONFIG_REISERFS_CHECK | 229 | #ifdef CONFIG_REISERFS_CHECK |
217 | extern struct tree_balance * cur_tb; | 230 | extern struct tree_balance *cur_tb; |
218 | #endif | 231 | #endif |
219 | 232 | ||
220 | |||
221 | |||
222 | /* Minimal possible key. It is never in the tree. */ | 233 | /* Minimal possible key. It is never in the tree. */ |
223 | const struct reiserfs_key MIN_KEY = {0, 0, {{0, 0},}}; | 234 | const struct reiserfs_key MIN_KEY = { 0, 0, {{0, 0},} }; |
224 | 235 | ||
225 | /* Maximal possible key. It is never in the tree. */ | 236 | /* Maximal possible key. It is never in the tree. */ |
226 | static const struct reiserfs_key MAX_KEY = { | 237 | static const struct reiserfs_key MAX_KEY = { |
227 | __constant_cpu_to_le32(0xffffffff), | 238 | __constant_cpu_to_le32(0xffffffff), |
228 | __constant_cpu_to_le32(0xffffffff), | 239 | __constant_cpu_to_le32(0xffffffff), |
229 | {{__constant_cpu_to_le32(0xffffffff), | 240 | {{__constant_cpu_to_le32(0xffffffff), |
230 | __constant_cpu_to_le32(0xffffffff)},} | 241 | __constant_cpu_to_le32(0xffffffff)},} |
231 | }; | 242 | }; |
232 | 243 | ||
233 | |||
234 | /* Get delimiting key of the buffer by looking for it in the buffers in the path, starting from the bottom | 244 | /* Get delimiting key of the buffer by looking for it in the buffers in the path, starting from the bottom |
235 | of the path, and going upwards. We must check the path's validity at each step. If the key is not in | 245 | of the path, and going upwards. We must check the path's validity at each step. If the key is not in |
236 | the path, there is no delimiting key in the tree (buffer is first or last buffer in tree), and in this | 246 | the path, there is no delimiting key in the tree (buffer is first or last buffer in tree), and in this |
237 | case we return a special key, either MIN_KEY or MAX_KEY. */ | 247 | case we return a special key, either MIN_KEY or MAX_KEY. */ |
238 | static inline const struct reiserfs_key * get_lkey ( | 248 | static inline const struct reiserfs_key *get_lkey(const struct path |
239 | const struct path * p_s_chk_path, | 249 | *p_s_chk_path, |
240 | const struct super_block * p_s_sb | 250 | const struct super_block |
241 | ) { | 251 | *p_s_sb) |
242 | int n_position, n_path_offset = p_s_chk_path->path_length; | 252 | { |
243 | struct buffer_head * p_s_parent; | 253 | int n_position, n_path_offset = p_s_chk_path->path_length; |
244 | 254 | struct buffer_head *p_s_parent; | |
245 | RFALSE( n_path_offset < FIRST_PATH_ELEMENT_OFFSET, | 255 | |
246 | "PAP-5010: invalid offset in the path"); | 256 | RFALSE(n_path_offset < FIRST_PATH_ELEMENT_OFFSET, |
247 | 257 | "PAP-5010: invalid offset in the path"); | |
248 | /* While not higher in path than first element. */ | 258 | |
249 | while ( n_path_offset-- > FIRST_PATH_ELEMENT_OFFSET ) { | 259 | /* While not higher in path than first element. */ |
250 | 260 | while (n_path_offset-- > FIRST_PATH_ELEMENT_OFFSET) { | |
251 | RFALSE( ! buffer_uptodate(PATH_OFFSET_PBUFFER(p_s_chk_path, n_path_offset)), | 261 | |
252 | "PAP-5020: parent is not uptodate"); | 262 | RFALSE(!buffer_uptodate |
253 | 263 | (PATH_OFFSET_PBUFFER(p_s_chk_path, n_path_offset)), | |
254 | /* Parent at the path is not in the tree now. */ | 264 | "PAP-5020: parent is not uptodate"); |
255 | if ( ! B_IS_IN_TREE(p_s_parent = PATH_OFFSET_PBUFFER(p_s_chk_path, n_path_offset)) ) | 265 | |
256 | return &MAX_KEY; | 266 | /* Parent at the path is not in the tree now. */ |
257 | /* Check whether position in the parent is correct. */ | 267 | if (!B_IS_IN_TREE |
258 | if ( (n_position = PATH_OFFSET_POSITION(p_s_chk_path, n_path_offset)) > B_NR_ITEMS(p_s_parent) ) | 268 | (p_s_parent = |
259 | return &MAX_KEY; | 269 | PATH_OFFSET_PBUFFER(p_s_chk_path, n_path_offset))) |
260 | /* Check whether parent at the path really points to the child. */ | 270 | return &MAX_KEY; |
261 | if ( B_N_CHILD_NUM(p_s_parent, n_position) != | 271 | /* Check whether position in the parent is correct. */ |
262 | PATH_OFFSET_PBUFFER(p_s_chk_path, n_path_offset + 1)->b_blocknr ) | 272 | if ((n_position = |
263 | return &MAX_KEY; | 273 | PATH_OFFSET_POSITION(p_s_chk_path, |
264 | /* Return delimiting key if position in the parent is not equal to zero. */ | 274 | n_path_offset)) > |
265 | if ( n_position ) | 275 | B_NR_ITEMS(p_s_parent)) |
266 | return B_N_PDELIM_KEY(p_s_parent, n_position - 1); | 276 | return &MAX_KEY; |
267 | } | 277 | /* Check whether parent at the path really points to the child. */ |
268 | /* Return MIN_KEY if we are in the root of the buffer tree. */ | 278 | if (B_N_CHILD_NUM(p_s_parent, n_position) != |
269 | if ( PATH_OFFSET_PBUFFER(p_s_chk_path, FIRST_PATH_ELEMENT_OFFSET)->b_blocknr == | 279 | PATH_OFFSET_PBUFFER(p_s_chk_path, |
270 | SB_ROOT_BLOCK (p_s_sb) ) | 280 | n_path_offset + 1)->b_blocknr) |
271 | return &MIN_KEY; | 281 | return &MAX_KEY; |
272 | return &MAX_KEY; | 282 | /* Return delimiting key if position in the parent is not equal to zero. */ |
283 | if (n_position) | ||
284 | return B_N_PDELIM_KEY(p_s_parent, n_position - 1); | ||
285 | } | ||
286 | /* Return MIN_KEY if we are in the root of the buffer tree. */ | ||
287 | if (PATH_OFFSET_PBUFFER(p_s_chk_path, FIRST_PATH_ELEMENT_OFFSET)-> | ||
288 | b_blocknr == SB_ROOT_BLOCK(p_s_sb)) | ||
289 | return &MIN_KEY; | ||
290 | return &MAX_KEY; | ||
273 | } | 291 | } |
274 | 292 | ||
275 | |||
276 | /* Get delimiting key of the buffer at the path and its right neighbor. */ | 293 | /* Get delimiting key of the buffer at the path and its right neighbor. */ |
277 | inline const struct reiserfs_key * get_rkey ( | 294 | inline const struct reiserfs_key *get_rkey(const struct path *p_s_chk_path, |
278 | const struct path * p_s_chk_path, | 295 | const struct super_block *p_s_sb) |
279 | const struct super_block * p_s_sb | 296 | { |
280 | ) { | 297 | int n_position, n_path_offset = p_s_chk_path->path_length; |
281 | int n_position, | 298 | struct buffer_head *p_s_parent; |
282 | n_path_offset = p_s_chk_path->path_length; | 299 | |
283 | struct buffer_head * p_s_parent; | 300 | RFALSE(n_path_offset < FIRST_PATH_ELEMENT_OFFSET, |
284 | 301 | "PAP-5030: invalid offset in the path"); | |
285 | RFALSE( n_path_offset < FIRST_PATH_ELEMENT_OFFSET, | 302 | |
286 | "PAP-5030: invalid offset in the path"); | 303 | while (n_path_offset-- > FIRST_PATH_ELEMENT_OFFSET) { |
287 | 304 | ||
288 | while ( n_path_offset-- > FIRST_PATH_ELEMENT_OFFSET ) { | 305 | RFALSE(!buffer_uptodate |
289 | 306 | (PATH_OFFSET_PBUFFER(p_s_chk_path, n_path_offset)), | |
290 | RFALSE( ! buffer_uptodate(PATH_OFFSET_PBUFFER(p_s_chk_path, n_path_offset)), | 307 | "PAP-5040: parent is not uptodate"); |
291 | "PAP-5040: parent is not uptodate"); | 308 | |
292 | 309 | /* Parent at the path is not in the tree now. */ | |
293 | /* Parent at the path is not in the tree now. */ | 310 | if (!B_IS_IN_TREE |
294 | if ( ! B_IS_IN_TREE(p_s_parent = PATH_OFFSET_PBUFFER(p_s_chk_path, n_path_offset)) ) | 311 | (p_s_parent = |
295 | return &MIN_KEY; | 312 | PATH_OFFSET_PBUFFER(p_s_chk_path, n_path_offset))) |
296 | /* Check whether position in the parent is correct. */ | 313 | return &MIN_KEY; |
297 | if ( (n_position = PATH_OFFSET_POSITION(p_s_chk_path, n_path_offset)) > B_NR_ITEMS(p_s_parent) ) | 314 | /* Check whether position in the parent is correct. */ |
298 | return &MIN_KEY; | 315 | if ((n_position = |
299 | /* Check whether parent at the path really points to the child. */ | 316 | PATH_OFFSET_POSITION(p_s_chk_path, |
300 | if ( B_N_CHILD_NUM(p_s_parent, n_position) != | 317 | n_path_offset)) > |
301 | PATH_OFFSET_PBUFFER(p_s_chk_path, n_path_offset + 1)->b_blocknr ) | 318 | B_NR_ITEMS(p_s_parent)) |
302 | return &MIN_KEY; | 319 | return &MIN_KEY; |
303 | /* Return delimiting key if position in the parent is not the last one. */ | 320 | /* Check whether parent at the path really points to the child. */ |
304 | if ( n_position != B_NR_ITEMS(p_s_parent) ) | 321 | if (B_N_CHILD_NUM(p_s_parent, n_position) != |
305 | return B_N_PDELIM_KEY(p_s_parent, n_position); | 322 | PATH_OFFSET_PBUFFER(p_s_chk_path, |
306 | } | 323 | n_path_offset + 1)->b_blocknr) |
307 | /* Return MAX_KEY if we are in the root of the buffer tree. */ | 324 | return &MIN_KEY; |
308 | if ( PATH_OFFSET_PBUFFER(p_s_chk_path, FIRST_PATH_ELEMENT_OFFSET)->b_blocknr == | 325 | /* Return delimiting key if position in the parent is not the last one. */ |
309 | SB_ROOT_BLOCK (p_s_sb) ) | 326 | if (n_position != B_NR_ITEMS(p_s_parent)) |
310 | return &MAX_KEY; | 327 | return B_N_PDELIM_KEY(p_s_parent, n_position); |
311 | return &MIN_KEY; | 328 | } |
329 | /* Return MAX_KEY if we are in the root of the buffer tree. */ | ||
330 | if (PATH_OFFSET_PBUFFER(p_s_chk_path, FIRST_PATH_ELEMENT_OFFSET)-> | ||
331 | b_blocknr == SB_ROOT_BLOCK(p_s_sb)) | ||
332 | return &MAX_KEY; | ||
333 | return &MIN_KEY; | ||
312 | } | 334 | } |
313 | 335 | ||
314 | |||
315 | /* Check whether a key is contained in the tree rooted from a buffer at a path. */ | 336 | /* Check whether a key is contained in the tree rooted from a buffer at a path. */ |
316 | /* This works by looking at the left and right delimiting keys for the buffer in the last path_element in | 337 | /* This works by looking at the left and right delimiting keys for the buffer in the last path_element in |
317 | the path. These delimiting keys are stored at least one level above that buffer in the tree. If the | 338 | the path. These delimiting keys are stored at least one level above that buffer in the tree. If the |
318 | buffer is the first or last node in the tree order then one of the delimiting keys may be absent, and in | 339 | buffer is the first or last node in the tree order then one of the delimiting keys may be absent, and in |
319 | this case get_lkey and get_rkey return a special key which is MIN_KEY or MAX_KEY. */ | 340 | this case get_lkey and get_rkey return a special key which is MIN_KEY or MAX_KEY. */ |
320 | static inline int key_in_buffer ( | 341 | static inline int key_in_buffer(struct path *p_s_chk_path, /* Path which should be checked. */ |
321 | struct path * p_s_chk_path, /* Path which should be checked. */ | 342 | const struct cpu_key *p_s_key, /* Key which should be checked. */ |
322 | const struct cpu_key * p_s_key, /* Key which should be checked. */ | 343 | struct super_block *p_s_sb /* Super block pointer. */ |
323 | struct super_block * p_s_sb /* Super block pointer. */ | 344 | ) |
324 | ) { | 345 | { |
325 | |||
326 | RFALSE( ! p_s_key || p_s_chk_path->path_length < FIRST_PATH_ELEMENT_OFFSET || | ||
327 | p_s_chk_path->path_length > MAX_HEIGHT, | ||
328 | "PAP-5050: pointer to the key(%p) is NULL or invalid path length(%d)", | ||
329 | p_s_key, p_s_chk_path->path_length); | ||
330 | RFALSE( !PATH_PLAST_BUFFER(p_s_chk_path)->b_bdev, | ||
331 | "PAP-5060: device must not be NODEV"); | ||
332 | |||
333 | if ( comp_keys(get_lkey(p_s_chk_path, p_s_sb), p_s_key) == 1 ) | ||
334 | /* left delimiting key is bigger, that the key we look for */ | ||
335 | return 0; | ||
336 | // if ( comp_keys(p_s_key, get_rkey(p_s_chk_path, p_s_sb)) != -1 ) | ||
337 | if ( comp_keys(get_rkey(p_s_chk_path, p_s_sb), p_s_key) != 1 ) | ||
338 | /* p_s_key must be less than right delimitiing key */ | ||
339 | return 0; | ||
340 | return 1; | ||
341 | } | ||
342 | |||
343 | 346 | ||
344 | inline void decrement_bcount( | 347 | RFALSE(!p_s_key || p_s_chk_path->path_length < FIRST_PATH_ELEMENT_OFFSET |
345 | struct buffer_head * p_s_bh | 348 | || p_s_chk_path->path_length > MAX_HEIGHT, |
346 | ) { | 349 | "PAP-5050: pointer to the key(%p) is NULL or invalid path length(%d)", |
347 | if ( p_s_bh ) { | 350 | p_s_key, p_s_chk_path->path_length); |
348 | if ( atomic_read (&(p_s_bh->b_count)) ) { | 351 | RFALSE(!PATH_PLAST_BUFFER(p_s_chk_path)->b_bdev, |
349 | put_bh(p_s_bh) ; | 352 | "PAP-5060: device must not be NODEV"); |
350 | return; | 353 | |
351 | } | 354 | if (comp_keys(get_lkey(p_s_chk_path, p_s_sb), p_s_key) == 1) |
352 | reiserfs_panic(NULL, "PAP-5070: decrement_bcount: trying to free free buffer %b", p_s_bh); | 355 | /* left delimiting key is bigger, that the key we look for */ |
353 | } | 356 | return 0; |
357 | // if ( comp_keys(p_s_key, get_rkey(p_s_chk_path, p_s_sb)) != -1 ) | ||
358 | if (comp_keys(get_rkey(p_s_chk_path, p_s_sb), p_s_key) != 1) | ||
359 | /* p_s_key must be less than right delimitiing key */ | ||
360 | return 0; | ||
361 | return 1; | ||
354 | } | 362 | } |
355 | 363 | ||
364 | inline void decrement_bcount(struct buffer_head *p_s_bh) | ||
365 | { | ||
366 | if (p_s_bh) { | ||
367 | if (atomic_read(&(p_s_bh->b_count))) { | ||
368 | put_bh(p_s_bh); | ||
369 | return; | ||
370 | } | ||
371 | reiserfs_panic(NULL, | ||
372 | "PAP-5070: decrement_bcount: trying to free free buffer %b", | ||
373 | p_s_bh); | ||
374 | } | ||
375 | } | ||
356 | 376 | ||
357 | /* Decrement b_count field of the all buffers in the path. */ | 377 | /* Decrement b_count field of the all buffers in the path. */ |
358 | void decrement_counters_in_path ( | 378 | void decrement_counters_in_path(struct path *p_s_search_path) |
359 | struct path * p_s_search_path | 379 | { |
360 | ) { | 380 | int n_path_offset = p_s_search_path->path_length; |
361 | int n_path_offset = p_s_search_path->path_length; | 381 | |
362 | 382 | RFALSE(n_path_offset < ILLEGAL_PATH_ELEMENT_OFFSET || | |
363 | RFALSE( n_path_offset < ILLEGAL_PATH_ELEMENT_OFFSET || | 383 | n_path_offset > EXTENDED_MAX_HEIGHT - 1, |
364 | n_path_offset > EXTENDED_MAX_HEIGHT - 1, | 384 | "PAP-5080: invalid path offset of %d", n_path_offset); |
365 | "PAP-5080: invalid path offset of %d", n_path_offset); | ||
366 | |||
367 | while ( n_path_offset > ILLEGAL_PATH_ELEMENT_OFFSET ) { | ||
368 | struct buffer_head * bh; | ||
369 | |||
370 | bh = PATH_OFFSET_PBUFFER(p_s_search_path, n_path_offset--); | ||
371 | decrement_bcount (bh); | ||
372 | } | ||
373 | p_s_search_path->path_length = ILLEGAL_PATH_ELEMENT_OFFSET; | ||
374 | } | ||
375 | 385 | ||
386 | while (n_path_offset > ILLEGAL_PATH_ELEMENT_OFFSET) { | ||
387 | struct buffer_head *bh; | ||
376 | 388 | ||
377 | int reiserfs_check_path(struct path *p) { | 389 | bh = PATH_OFFSET_PBUFFER(p_s_search_path, n_path_offset--); |
378 | RFALSE( p->path_length != ILLEGAL_PATH_ELEMENT_OFFSET, | 390 | decrement_bcount(bh); |
379 | "path not properly relsed") ; | 391 | } |
380 | return 0 ; | 392 | p_s_search_path->path_length = ILLEGAL_PATH_ELEMENT_OFFSET; |
381 | } | 393 | } |
382 | 394 | ||
395 | int reiserfs_check_path(struct path *p) | ||
396 | { | ||
397 | RFALSE(p->path_length != ILLEGAL_PATH_ELEMENT_OFFSET, | ||
398 | "path not properly relsed"); | ||
399 | return 0; | ||
400 | } | ||
383 | 401 | ||
384 | /* Release all buffers in the path. Restore dirty bits clean | 402 | /* Release all buffers in the path. Restore dirty bits clean |
385 | ** when preparing the buffer for the log | 403 | ** when preparing the buffer for the log |
386 | ** | 404 | ** |
387 | ** only called from fix_nodes() | 405 | ** only called from fix_nodes() |
388 | */ | 406 | */ |
389 | void pathrelse_and_restore ( | 407 | void pathrelse_and_restore(struct super_block *s, struct path *p_s_search_path) |
390 | struct super_block *s, | 408 | { |
391 | struct path * p_s_search_path | 409 | int n_path_offset = p_s_search_path->path_length; |
392 | ) { | 410 | |
393 | int n_path_offset = p_s_search_path->path_length; | 411 | RFALSE(n_path_offset < ILLEGAL_PATH_ELEMENT_OFFSET, |
394 | 412 | "clm-4000: invalid path offset"); | |
395 | RFALSE( n_path_offset < ILLEGAL_PATH_ELEMENT_OFFSET, | 413 | |
396 | "clm-4000: invalid path offset"); | 414 | while (n_path_offset > ILLEGAL_PATH_ELEMENT_OFFSET) { |
397 | 415 | reiserfs_restore_prepared_buffer(s, | |
398 | while ( n_path_offset > ILLEGAL_PATH_ELEMENT_OFFSET ) { | 416 | PATH_OFFSET_PBUFFER |
399 | reiserfs_restore_prepared_buffer(s, PATH_OFFSET_PBUFFER(p_s_search_path, | 417 | (p_s_search_path, |
400 | n_path_offset)); | 418 | n_path_offset)); |
401 | brelse(PATH_OFFSET_PBUFFER(p_s_search_path, n_path_offset--)); | 419 | brelse(PATH_OFFSET_PBUFFER(p_s_search_path, n_path_offset--)); |
402 | } | 420 | } |
403 | p_s_search_path->path_length = ILLEGAL_PATH_ELEMENT_OFFSET; | 421 | p_s_search_path->path_length = ILLEGAL_PATH_ELEMENT_OFFSET; |
404 | } | 422 | } |
405 | 423 | ||
406 | /* Release all buffers in the path. */ | 424 | /* Release all buffers in the path. */ |
407 | void pathrelse ( | 425 | void pathrelse(struct path *p_s_search_path) |
408 | struct path * p_s_search_path | 426 | { |
409 | ) { | 427 | int n_path_offset = p_s_search_path->path_length; |
410 | int n_path_offset = p_s_search_path->path_length; | ||
411 | |||
412 | RFALSE( n_path_offset < ILLEGAL_PATH_ELEMENT_OFFSET, | ||
413 | "PAP-5090: invalid path offset"); | ||
414 | |||
415 | while ( n_path_offset > ILLEGAL_PATH_ELEMENT_OFFSET ) | ||
416 | brelse(PATH_OFFSET_PBUFFER(p_s_search_path, n_path_offset--)); | ||
417 | |||
418 | p_s_search_path->path_length = ILLEGAL_PATH_ELEMENT_OFFSET; | ||
419 | } | ||
420 | 428 | ||
429 | RFALSE(n_path_offset < ILLEGAL_PATH_ELEMENT_OFFSET, | ||
430 | "PAP-5090: invalid path offset"); | ||
421 | 431 | ||
432 | while (n_path_offset > ILLEGAL_PATH_ELEMENT_OFFSET) | ||
433 | brelse(PATH_OFFSET_PBUFFER(p_s_search_path, n_path_offset--)); | ||
422 | 434 | ||
423 | static int is_leaf (char * buf, int blocksize, struct buffer_head * bh) | 435 | p_s_search_path->path_length = ILLEGAL_PATH_ELEMENT_OFFSET; |
424 | { | 436 | } |
425 | struct block_head * blkh; | ||
426 | struct item_head * ih; | ||
427 | int used_space; | ||
428 | int prev_location; | ||
429 | int i; | ||
430 | int nr; | ||
431 | |||
432 | blkh = (struct block_head *)buf; | ||
433 | if ( blkh_level(blkh) != DISK_LEAF_NODE_LEVEL) { | ||
434 | reiserfs_warning (NULL, "is_leaf: this should be caught earlier"); | ||
435 | return 0; | ||
436 | } | ||
437 | 437 | ||
438 | nr = blkh_nr_item(blkh); | 438 | static int is_leaf(char *buf, int blocksize, struct buffer_head *bh) |
439 | if (nr < 1 || nr > ((blocksize - BLKH_SIZE) / (IH_SIZE + MIN_ITEM_LEN))) { | 439 | { |
440 | /* item number is too big or too small */ | 440 | struct block_head *blkh; |
441 | reiserfs_warning (NULL, "is_leaf: nr_item seems wrong: %z", bh); | 441 | struct item_head *ih; |
442 | return 0; | 442 | int used_space; |
443 | } | 443 | int prev_location; |
444 | ih = (struct item_head *)(buf + BLKH_SIZE) + nr - 1; | 444 | int i; |
445 | used_space = BLKH_SIZE + IH_SIZE * nr + (blocksize - ih_location (ih)); | 445 | int nr; |
446 | if (used_space != blocksize - blkh_free_space(blkh)) { | 446 | |
447 | /* free space does not match to calculated amount of use space */ | 447 | blkh = (struct block_head *)buf; |
448 | reiserfs_warning (NULL, "is_leaf: free space seems wrong: %z", bh); | 448 | if (blkh_level(blkh) != DISK_LEAF_NODE_LEVEL) { |
449 | return 0; | 449 | reiserfs_warning(NULL, |
450 | } | 450 | "is_leaf: this should be caught earlier"); |
451 | 451 | return 0; | |
452 | // FIXME: it is_leaf will hit performance too much - we may have | ||
453 | // return 1 here | ||
454 | |||
455 | /* check tables of item heads */ | ||
456 | ih = (struct item_head *)(buf + BLKH_SIZE); | ||
457 | prev_location = blocksize; | ||
458 | for (i = 0; i < nr; i ++, ih ++) { | ||
459 | if ( le_ih_k_type(ih) == TYPE_ANY) { | ||
460 | reiserfs_warning (NULL, "is_leaf: wrong item type for item %h",ih); | ||
461 | return 0; | ||
462 | } | 452 | } |
463 | if (ih_location (ih) >= blocksize || ih_location (ih) < IH_SIZE * nr) { | 453 | |
464 | reiserfs_warning (NULL, "is_leaf: item location seems wrong: %h", ih); | 454 | nr = blkh_nr_item(blkh); |
465 | return 0; | 455 | if (nr < 1 || nr > ((blocksize - BLKH_SIZE) / (IH_SIZE + MIN_ITEM_LEN))) { |
456 | /* item number is too big or too small */ | ||
457 | reiserfs_warning(NULL, "is_leaf: nr_item seems wrong: %z", bh); | ||
458 | return 0; | ||
466 | } | 459 | } |
467 | if (ih_item_len (ih) < 1 || ih_item_len (ih) > MAX_ITEM_LEN (blocksize)) { | 460 | ih = (struct item_head *)(buf + BLKH_SIZE) + nr - 1; |
468 | reiserfs_warning (NULL, "is_leaf: item length seems wrong: %h", ih); | 461 | used_space = BLKH_SIZE + IH_SIZE * nr + (blocksize - ih_location(ih)); |
469 | return 0; | 462 | if (used_space != blocksize - blkh_free_space(blkh)) { |
463 | /* free space does not match to calculated amount of use space */ | ||
464 | reiserfs_warning(NULL, "is_leaf: free space seems wrong: %z", | ||
465 | bh); | ||
466 | return 0; | ||
470 | } | 467 | } |
471 | if (prev_location - ih_location (ih) != ih_item_len (ih)) { | 468 | // FIXME: it is_leaf will hit performance too much - we may have |
472 | reiserfs_warning (NULL, "is_leaf: item location seems wrong (second one): %h", ih); | 469 | // return 1 here |
473 | return 0; | 470 | |
471 | /* check tables of item heads */ | ||
472 | ih = (struct item_head *)(buf + BLKH_SIZE); | ||
473 | prev_location = blocksize; | ||
474 | for (i = 0; i < nr; i++, ih++) { | ||
475 | if (le_ih_k_type(ih) == TYPE_ANY) { | ||
476 | reiserfs_warning(NULL, | ||
477 | "is_leaf: wrong item type for item %h", | ||
478 | ih); | ||
479 | return 0; | ||
480 | } | ||
481 | if (ih_location(ih) >= blocksize | ||
482 | || ih_location(ih) < IH_SIZE * nr) { | ||
483 | reiserfs_warning(NULL, | ||
484 | "is_leaf: item location seems wrong: %h", | ||
485 | ih); | ||
486 | return 0; | ||
487 | } | ||
488 | if (ih_item_len(ih) < 1 | ||
489 | || ih_item_len(ih) > MAX_ITEM_LEN(blocksize)) { | ||
490 | reiserfs_warning(NULL, | ||
491 | "is_leaf: item length seems wrong: %h", | ||
492 | ih); | ||
493 | return 0; | ||
494 | } | ||
495 | if (prev_location - ih_location(ih) != ih_item_len(ih)) { | ||
496 | reiserfs_warning(NULL, | ||
497 | "is_leaf: item location seems wrong (second one): %h", | ||
498 | ih); | ||
499 | return 0; | ||
500 | } | ||
501 | prev_location = ih_location(ih); | ||
474 | } | 502 | } |
475 | prev_location = ih_location (ih); | ||
476 | } | ||
477 | 503 | ||
478 | // one may imagine much more checks | 504 | // one may imagine much more checks |
479 | return 1; | 505 | return 1; |
480 | } | 506 | } |
481 | 507 | ||
482 | |||
483 | /* returns 1 if buf looks like an internal node, 0 otherwise */ | 508 | /* returns 1 if buf looks like an internal node, 0 otherwise */ |
484 | static int is_internal (char * buf, int blocksize, struct buffer_head * bh) | 509 | static int is_internal(char *buf, int blocksize, struct buffer_head *bh) |
485 | { | 510 | { |
486 | struct block_head * blkh; | 511 | struct block_head *blkh; |
487 | int nr; | 512 | int nr; |
488 | int used_space; | 513 | int used_space; |
489 | 514 | ||
490 | blkh = (struct block_head *)buf; | 515 | blkh = (struct block_head *)buf; |
491 | nr = blkh_level(blkh); | 516 | nr = blkh_level(blkh); |
492 | if (nr <= DISK_LEAF_NODE_LEVEL || nr > MAX_HEIGHT) { | 517 | if (nr <= DISK_LEAF_NODE_LEVEL || nr > MAX_HEIGHT) { |
493 | /* this level is not possible for internal nodes */ | 518 | /* this level is not possible for internal nodes */ |
494 | reiserfs_warning (NULL, "is_internal: this should be caught earlier"); | 519 | reiserfs_warning(NULL, |
495 | return 0; | 520 | "is_internal: this should be caught earlier"); |
496 | } | 521 | return 0; |
497 | 522 | } | |
498 | nr = blkh_nr_item(blkh); | ||
499 | if (nr > (blocksize - BLKH_SIZE - DC_SIZE) / (KEY_SIZE + DC_SIZE)) { | ||
500 | /* for internal which is not root we might check min number of keys */ | ||
501 | reiserfs_warning (NULL, "is_internal: number of key seems wrong: %z", bh); | ||
502 | return 0; | ||
503 | } | ||
504 | 523 | ||
505 | used_space = BLKH_SIZE + KEY_SIZE * nr + DC_SIZE * (nr + 1); | 524 | nr = blkh_nr_item(blkh); |
506 | if (used_space != blocksize - blkh_free_space(blkh)) { | 525 | if (nr > (blocksize - BLKH_SIZE - DC_SIZE) / (KEY_SIZE + DC_SIZE)) { |
507 | reiserfs_warning (NULL, "is_internal: free space seems wrong: %z", bh); | 526 | /* for internal which is not root we might check min number of keys */ |
508 | return 0; | 527 | reiserfs_warning(NULL, |
509 | } | 528 | "is_internal: number of key seems wrong: %z", |
529 | bh); | ||
530 | return 0; | ||
531 | } | ||
510 | 532 | ||
511 | // one may imagine much more checks | 533 | used_space = BLKH_SIZE + KEY_SIZE * nr + DC_SIZE * (nr + 1); |
512 | return 1; | 534 | if (used_space != blocksize - blkh_free_space(blkh)) { |
535 | reiserfs_warning(NULL, | ||
536 | "is_internal: free space seems wrong: %z", bh); | ||
537 | return 0; | ||
538 | } | ||
539 | // one may imagine much more checks | ||
540 | return 1; | ||
513 | } | 541 | } |
514 | 542 | ||
515 | |||
516 | // make sure that bh contains formatted node of reiserfs tree of | 543 | // make sure that bh contains formatted node of reiserfs tree of |
517 | // 'level'-th level | 544 | // 'level'-th level |
518 | static int is_tree_node (struct buffer_head * bh, int level) | 545 | static int is_tree_node(struct buffer_head *bh, int level) |
519 | { | 546 | { |
520 | if (B_LEVEL (bh) != level) { | 547 | if (B_LEVEL(bh) != level) { |
521 | reiserfs_warning (NULL, "is_tree_node: node level %d does not match to the expected one %d", | 548 | reiserfs_warning(NULL, |
522 | B_LEVEL (bh), level); | 549 | "is_tree_node: node level %d does not match to the expected one %d", |
523 | return 0; | 550 | B_LEVEL(bh), level); |
524 | } | 551 | return 0; |
525 | if (level == DISK_LEAF_NODE_LEVEL) | 552 | } |
526 | return is_leaf (bh->b_data, bh->b_size, bh); | 553 | if (level == DISK_LEAF_NODE_LEVEL) |
554 | return is_leaf(bh->b_data, bh->b_size, bh); | ||
527 | 555 | ||
528 | return is_internal (bh->b_data, bh->b_size, bh); | 556 | return is_internal(bh->b_data, bh->b_size, bh); |
529 | } | 557 | } |
530 | 558 | ||
531 | |||
532 | |||
533 | #define SEARCH_BY_KEY_READA 16 | 559 | #define SEARCH_BY_KEY_READA 16 |
534 | 560 | ||
535 | /* The function is NOT SCHEDULE-SAFE! */ | 561 | /* The function is NOT SCHEDULE-SAFE! */ |
536 | static void search_by_key_reada (struct super_block * s, | 562 | static void search_by_key_reada(struct super_block *s, |
537 | struct buffer_head **bh, | 563 | struct buffer_head **bh, |
538 | unsigned long *b, int num) | 564 | unsigned long *b, int num) |
539 | { | 565 | { |
540 | int i,j; | 566 | int i, j; |
541 | 567 | ||
542 | for (i = 0 ; i < num ; i++) { | 568 | for (i = 0; i < num; i++) { |
543 | bh[i] = sb_getblk (s, b[i]); | 569 | bh[i] = sb_getblk(s, b[i]); |
544 | } | 570 | } |
545 | for (j = 0 ; j < i ; j++) { | 571 | for (j = 0; j < i; j++) { |
546 | /* | 572 | /* |
547 | * note, this needs attention if we are getting rid of the BKL | 573 | * note, this needs attention if we are getting rid of the BKL |
548 | * you have to make sure the prepared bit isn't set on this buffer | 574 | * you have to make sure the prepared bit isn't set on this buffer |
549 | */ | 575 | */ |
550 | if (!buffer_uptodate(bh[j])) | 576 | if (!buffer_uptodate(bh[j])) |
551 | ll_rw_block(READA, 1, bh + j); | 577 | ll_rw_block(READA, 1, bh + j); |
552 | brelse(bh[j]); | 578 | brelse(bh[j]); |
553 | } | 579 | } |
554 | } | 580 | } |
555 | 581 | ||
556 | /************************************************************************** | 582 | /************************************************************************** |
@@ -576,194 +602,200 @@ static void search_by_key_reada (struct super_block * s, | |||
576 | correctness of the top of the path but need not be checked for the | 602 | correctness of the top of the path but need not be checked for the |
577 | correctness of the bottom of the path */ | 603 | correctness of the bottom of the path */ |
578 | /* The function is NOT SCHEDULE-SAFE! */ | 604 | /* The function is NOT SCHEDULE-SAFE! */ |
579 | int search_by_key (struct super_block * p_s_sb, | 605 | int search_by_key(struct super_block *p_s_sb, const struct cpu_key *p_s_key, /* Key to search. */ |
580 | const struct cpu_key * p_s_key, /* Key to search. */ | 606 | struct path *p_s_search_path, /* This structure was |
581 | struct path * p_s_search_path, /* This structure was | 607 | allocated and initialized |
582 | allocated and initialized | 608 | by the calling |
583 | by the calling | 609 | function. It is filled up |
584 | function. It is filled up | 610 | by this function. */ |
585 | by this function. */ | 611 | int n_stop_level /* How far down the tree to search. To |
586 | int n_stop_level /* How far down the tree to search. To | 612 | stop at leaf level - set to |
587 | stop at leaf level - set to | 613 | DISK_LEAF_NODE_LEVEL */ |
588 | DISK_LEAF_NODE_LEVEL */ | 614 | ) |
589 | ) { | 615 | { |
590 | int n_block_number; | 616 | int n_block_number; |
591 | int expected_level; | 617 | int expected_level; |
592 | struct buffer_head * p_s_bh; | 618 | struct buffer_head *p_s_bh; |
593 | struct path_element * p_s_last_element; | 619 | struct path_element *p_s_last_element; |
594 | int n_node_level, n_retval; | 620 | int n_node_level, n_retval; |
595 | int right_neighbor_of_leaf_node; | 621 | int right_neighbor_of_leaf_node; |
596 | int fs_gen; | 622 | int fs_gen; |
597 | struct buffer_head *reada_bh[SEARCH_BY_KEY_READA]; | 623 | struct buffer_head *reada_bh[SEARCH_BY_KEY_READA]; |
598 | unsigned long reada_blocks[SEARCH_BY_KEY_READA]; | 624 | unsigned long reada_blocks[SEARCH_BY_KEY_READA]; |
599 | int reada_count = 0; | 625 | int reada_count = 0; |
600 | 626 | ||
601 | #ifdef CONFIG_REISERFS_CHECK | 627 | #ifdef CONFIG_REISERFS_CHECK |
602 | int n_repeat_counter = 0; | 628 | int n_repeat_counter = 0; |
603 | #endif | 629 | #endif |
604 | |||
605 | PROC_INFO_INC( p_s_sb, search_by_key ); | ||
606 | |||
607 | /* As we add each node to a path we increase its count. This means that | ||
608 | we must be careful to release all nodes in a path before we either | ||
609 | discard the path struct or re-use the path struct, as we do here. */ | ||
610 | 630 | ||
611 | decrement_counters_in_path(p_s_search_path); | 631 | PROC_INFO_INC(p_s_sb, search_by_key); |
632 | |||
633 | /* As we add each node to a path we increase its count. This means that | ||
634 | we must be careful to release all nodes in a path before we either | ||
635 | discard the path struct or re-use the path struct, as we do here. */ | ||
612 | 636 | ||
613 | right_neighbor_of_leaf_node = 0; | 637 | decrement_counters_in_path(p_s_search_path); |
614 | 638 | ||
615 | /* With each iteration of this loop we search through the items in the | 639 | right_neighbor_of_leaf_node = 0; |
616 | current node, and calculate the next current node(next path element) | 640 | |
617 | for the next iteration of this loop.. */ | 641 | /* With each iteration of this loop we search through the items in the |
618 | n_block_number = SB_ROOT_BLOCK (p_s_sb); | 642 | current node, and calculate the next current node(next path element) |
619 | expected_level = -1; | 643 | for the next iteration of this loop.. */ |
620 | while ( 1 ) { | 644 | n_block_number = SB_ROOT_BLOCK(p_s_sb); |
645 | expected_level = -1; | ||
646 | while (1) { | ||
621 | 647 | ||
622 | #ifdef CONFIG_REISERFS_CHECK | 648 | #ifdef CONFIG_REISERFS_CHECK |
623 | if ( !(++n_repeat_counter % 50000) ) | 649 | if (!(++n_repeat_counter % 50000)) |
624 | reiserfs_warning (p_s_sb, "PAP-5100: search_by_key: %s:" | 650 | reiserfs_warning(p_s_sb, "PAP-5100: search_by_key: %s:" |
625 | "there were %d iterations of while loop " | 651 | "there were %d iterations of while loop " |
626 | "looking for key %K", | 652 | "looking for key %K", |
627 | current->comm, n_repeat_counter, p_s_key); | 653 | current->comm, n_repeat_counter, |
654 | p_s_key); | ||
628 | #endif | 655 | #endif |
629 | 656 | ||
630 | /* prep path to have another element added to it. */ | 657 | /* prep path to have another element added to it. */ |
631 | p_s_last_element = PATH_OFFSET_PELEMENT(p_s_search_path, ++p_s_search_path->path_length); | 658 | p_s_last_element = |
632 | fs_gen = get_generation (p_s_sb); | 659 | PATH_OFFSET_PELEMENT(p_s_search_path, |
633 | 660 | ++p_s_search_path->path_length); | |
634 | /* Read the next tree node, and set the last element in the path to | 661 | fs_gen = get_generation(p_s_sb); |
635 | have a pointer to it. */ | 662 | |
636 | if ((p_s_bh = p_s_last_element->pe_buffer = | 663 | /* Read the next tree node, and set the last element in the path to |
637 | sb_getblk(p_s_sb, n_block_number)) ) { | 664 | have a pointer to it. */ |
638 | if (!buffer_uptodate(p_s_bh) && reada_count > 1) { | 665 | if ((p_s_bh = p_s_last_element->pe_buffer = |
639 | search_by_key_reada (p_s_sb, reada_bh, | 666 | sb_getblk(p_s_sb, n_block_number))) { |
640 | reada_blocks, reada_count); | 667 | if (!buffer_uptodate(p_s_bh) && reada_count > 1) { |
641 | } | 668 | search_by_key_reada(p_s_sb, reada_bh, |
642 | ll_rw_block(READ, 1, &p_s_bh); | 669 | reada_blocks, reada_count); |
643 | wait_on_buffer(p_s_bh); | 670 | } |
644 | if (!buffer_uptodate(p_s_bh)) | 671 | ll_rw_block(READ, 1, &p_s_bh); |
645 | goto io_error; | 672 | wait_on_buffer(p_s_bh); |
646 | } else { | 673 | if (!buffer_uptodate(p_s_bh)) |
647 | io_error: | 674 | goto io_error; |
648 | p_s_search_path->path_length --; | 675 | } else { |
649 | pathrelse(p_s_search_path); | 676 | io_error: |
650 | return IO_ERROR; | 677 | p_s_search_path->path_length--; |
651 | } | 678 | pathrelse(p_s_search_path); |
652 | reada_count = 0; | 679 | return IO_ERROR; |
653 | if (expected_level == -1) | 680 | } |
654 | expected_level = SB_TREE_HEIGHT (p_s_sb); | 681 | reada_count = 0; |
655 | expected_level --; | 682 | if (expected_level == -1) |
656 | 683 | expected_level = SB_TREE_HEIGHT(p_s_sb); | |
657 | /* It is possible that schedule occurred. We must check whether the key | 684 | expected_level--; |
658 | to search is still in the tree rooted from the current buffer. If | 685 | |
659 | not then repeat search from the root. */ | 686 | /* It is possible that schedule occurred. We must check whether the key |
660 | if ( fs_changed (fs_gen, p_s_sb) && | 687 | to search is still in the tree rooted from the current buffer. If |
661 | (!B_IS_IN_TREE (p_s_bh) || | 688 | not then repeat search from the root. */ |
662 | B_LEVEL(p_s_bh) != expected_level || | 689 | if (fs_changed(fs_gen, p_s_sb) && |
663 | !key_in_buffer(p_s_search_path, p_s_key, p_s_sb))) { | 690 | (!B_IS_IN_TREE(p_s_bh) || |
664 | PROC_INFO_INC( p_s_sb, search_by_key_fs_changed ); | 691 | B_LEVEL(p_s_bh) != expected_level || |
665 | PROC_INFO_INC( p_s_sb, search_by_key_restarted ); | 692 | !key_in_buffer(p_s_search_path, p_s_key, p_s_sb))) { |
666 | PROC_INFO_INC( p_s_sb, sbk_restarted[ expected_level - 1 ] ); | 693 | PROC_INFO_INC(p_s_sb, search_by_key_fs_changed); |
667 | decrement_counters_in_path(p_s_search_path); | 694 | PROC_INFO_INC(p_s_sb, search_by_key_restarted); |
668 | 695 | PROC_INFO_INC(p_s_sb, | |
669 | /* Get the root block number so that we can repeat the search | 696 | sbk_restarted[expected_level - 1]); |
670 | starting from the root. */ | 697 | decrement_counters_in_path(p_s_search_path); |
671 | n_block_number = SB_ROOT_BLOCK (p_s_sb); | 698 | |
672 | expected_level = -1; | 699 | /* Get the root block number so that we can repeat the search |
673 | right_neighbor_of_leaf_node = 0; | 700 | starting from the root. */ |
674 | 701 | n_block_number = SB_ROOT_BLOCK(p_s_sb); | |
675 | /* repeat search from the root */ | 702 | expected_level = -1; |
676 | continue; | 703 | right_neighbor_of_leaf_node = 0; |
677 | } | 704 | |
705 | /* repeat search from the root */ | ||
706 | continue; | ||
707 | } | ||
678 | 708 | ||
679 | /* only check that the key is in the buffer if p_s_key is not | 709 | /* only check that the key is in the buffer if p_s_key is not |
680 | equal to the MAX_KEY. Latter case is only possible in | 710 | equal to the MAX_KEY. Latter case is only possible in |
681 | "finish_unfinished()" processing during mount. */ | 711 | "finish_unfinished()" processing during mount. */ |
682 | RFALSE( comp_keys( &MAX_KEY, p_s_key ) && | 712 | RFALSE(comp_keys(&MAX_KEY, p_s_key) && |
683 | ! key_in_buffer(p_s_search_path, p_s_key, p_s_sb), | 713 | !key_in_buffer(p_s_search_path, p_s_key, p_s_sb), |
684 | "PAP-5130: key is not in the buffer"); | 714 | "PAP-5130: key is not in the buffer"); |
685 | #ifdef CONFIG_REISERFS_CHECK | 715 | #ifdef CONFIG_REISERFS_CHECK |
686 | if ( cur_tb ) { | 716 | if (cur_tb) { |
687 | print_cur_tb ("5140"); | 717 | print_cur_tb("5140"); |
688 | reiserfs_panic(p_s_sb, "PAP-5140: search_by_key: schedule occurred in do_balance!"); | 718 | reiserfs_panic(p_s_sb, |
689 | } | 719 | "PAP-5140: search_by_key: schedule occurred in do_balance!"); |
720 | } | ||
690 | #endif | 721 | #endif |
691 | 722 | ||
692 | // make sure, that the node contents look like a node of | 723 | // make sure, that the node contents look like a node of |
693 | // certain level | 724 | // certain level |
694 | if (!is_tree_node (p_s_bh, expected_level)) { | 725 | if (!is_tree_node(p_s_bh, expected_level)) { |
695 | reiserfs_warning (p_s_sb, "vs-5150: search_by_key: " | 726 | reiserfs_warning(p_s_sb, "vs-5150: search_by_key: " |
696 | "invalid format found in block %ld. Fsck?", | 727 | "invalid format found in block %ld. Fsck?", |
697 | p_s_bh->b_blocknr); | 728 | p_s_bh->b_blocknr); |
698 | pathrelse (p_s_search_path); | 729 | pathrelse(p_s_search_path); |
699 | return IO_ERROR; | 730 | return IO_ERROR; |
700 | } | 731 | } |
701 | |||
702 | /* ok, we have acquired next formatted node in the tree */ | ||
703 | n_node_level = B_LEVEL (p_s_bh); | ||
704 | |||
705 | PROC_INFO_BH_STAT( p_s_sb, p_s_bh, n_node_level - 1 ); | ||
706 | |||
707 | RFALSE( n_node_level < n_stop_level, | ||
708 | "vs-5152: tree level (%d) is less than stop level (%d)", | ||
709 | n_node_level, n_stop_level); | ||
710 | |||
711 | n_retval = bin_search( p_s_key, B_N_PITEM_HEAD(p_s_bh, 0), | ||
712 | B_NR_ITEMS(p_s_bh), | ||
713 | ( n_node_level == DISK_LEAF_NODE_LEVEL ) ? IH_SIZE : KEY_SIZE, | ||
714 | &(p_s_last_element->pe_position)); | ||
715 | if (n_node_level == n_stop_level) { | ||
716 | return n_retval; | ||
717 | } | ||
718 | 732 | ||
719 | /* we are not in the stop level */ | 733 | /* ok, we have acquired next formatted node in the tree */ |
720 | if (n_retval == ITEM_FOUND) | 734 | n_node_level = B_LEVEL(p_s_bh); |
721 | /* item has been found, so we choose the pointer which is to the right of the found one */ | ||
722 | p_s_last_element->pe_position++; | ||
723 | 735 | ||
724 | /* if item was not found we choose the position which is to | 736 | PROC_INFO_BH_STAT(p_s_sb, p_s_bh, n_node_level - 1); |
725 | the left of the found item. This requires no code, | ||
726 | bin_search did it already.*/ | ||
727 | 737 | ||
728 | /* So we have chosen a position in the current node which is | 738 | RFALSE(n_node_level < n_stop_level, |
729 | an internal node. Now we calculate child block number by | 739 | "vs-5152: tree level (%d) is less than stop level (%d)", |
730 | position in the node. */ | 740 | n_node_level, n_stop_level); |
731 | n_block_number = B_N_CHILD_NUM(p_s_bh, p_s_last_element->pe_position); | ||
732 | 741 | ||
733 | /* if we are going to read leaf nodes, try for read ahead as well */ | 742 | n_retval = bin_search(p_s_key, B_N_PITEM_HEAD(p_s_bh, 0), |
734 | if ((p_s_search_path->reada & PATH_READA) && | 743 | B_NR_ITEMS(p_s_bh), |
735 | n_node_level == DISK_LEAF_NODE_LEVEL + 1) | 744 | (n_node_level == |
736 | { | 745 | DISK_LEAF_NODE_LEVEL) ? IH_SIZE : |
737 | int pos = p_s_last_element->pe_position; | 746 | KEY_SIZE, |
738 | int limit = B_NR_ITEMS(p_s_bh); | 747 | &(p_s_last_element->pe_position)); |
739 | struct reiserfs_key *le_key; | 748 | if (n_node_level == n_stop_level) { |
740 | 749 | return n_retval; | |
741 | if (p_s_search_path->reada & PATH_READA_BACK) | 750 | } |
742 | limit = 0; | ||
743 | while(reada_count < SEARCH_BY_KEY_READA) { | ||
744 | if (pos == limit) | ||
745 | break; | ||
746 | reada_blocks[reada_count++] = B_N_CHILD_NUM(p_s_bh, pos); | ||
747 | if (p_s_search_path->reada & PATH_READA_BACK) | ||
748 | pos--; | ||
749 | else | ||
750 | pos++; | ||
751 | 751 | ||
752 | /* | 752 | /* we are not in the stop level */ |
753 | * check to make sure we're in the same object | 753 | if (n_retval == ITEM_FOUND) |
754 | */ | 754 | /* item has been found, so we choose the pointer which is to the right of the found one */ |
755 | le_key = B_N_PDELIM_KEY(p_s_bh, pos); | 755 | p_s_last_element->pe_position++; |
756 | if (le32_to_cpu(le_key->k_objectid) != | 756 | |
757 | p_s_key->on_disk_key.k_objectid) | 757 | /* if item was not found we choose the position which is to |
758 | { | 758 | the left of the found item. This requires no code, |
759 | break; | 759 | bin_search did it already. */ |
760 | |||
761 | /* So we have chosen a position in the current node which is | ||
762 | an internal node. Now we calculate child block number by | ||
763 | position in the node. */ | ||
764 | n_block_number = | ||
765 | B_N_CHILD_NUM(p_s_bh, p_s_last_element->pe_position); | ||
766 | |||
767 | /* if we are going to read leaf nodes, try for read ahead as well */ | ||
768 | if ((p_s_search_path->reada & PATH_READA) && | ||
769 | n_node_level == DISK_LEAF_NODE_LEVEL + 1) { | ||
770 | int pos = p_s_last_element->pe_position; | ||
771 | int limit = B_NR_ITEMS(p_s_bh); | ||
772 | struct reiserfs_key *le_key; | ||
773 | |||
774 | if (p_s_search_path->reada & PATH_READA_BACK) | ||
775 | limit = 0; | ||
776 | while (reada_count < SEARCH_BY_KEY_READA) { | ||
777 | if (pos == limit) | ||
778 | break; | ||
779 | reada_blocks[reada_count++] = | ||
780 | B_N_CHILD_NUM(p_s_bh, pos); | ||
781 | if (p_s_search_path->reada & PATH_READA_BACK) | ||
782 | pos--; | ||
783 | else | ||
784 | pos++; | ||
785 | |||
786 | /* | ||
787 | * check to make sure we're in the same object | ||
788 | */ | ||
789 | le_key = B_N_PDELIM_KEY(p_s_bh, pos); | ||
790 | if (le32_to_cpu(le_key->k_objectid) != | ||
791 | p_s_key->on_disk_key.k_objectid) { | ||
792 | break; | ||
793 | } | ||
794 | } | ||
760 | } | 795 | } |
761 | } | 796 | } |
762 | } | ||
763 | } | ||
764 | } | 797 | } |
765 | 798 | ||
766 | |||
767 | /* Form the path to an item and position in this item which contains | 799 | /* Form the path to an item and position in this item which contains |
768 | file byte defined by p_s_key. If there is no such item | 800 | file byte defined by p_s_key. If there is no such item |
769 | corresponding to the key, we point the path to the item with | 801 | corresponding to the key, we point the path to the item with |
@@ -780,94 +812,97 @@ io_error: | |||
780 | units of directory entries. */ | 812 | units of directory entries. */ |
781 | 813 | ||
782 | /* The function is NOT SCHEDULE-SAFE! */ | 814 | /* The function is NOT SCHEDULE-SAFE! */ |
783 | int search_for_position_by_key (struct super_block * p_s_sb, /* Pointer to the super block. */ | 815 | int search_for_position_by_key(struct super_block *p_s_sb, /* Pointer to the super block. */ |
784 | const struct cpu_key * p_cpu_key, /* Key to search (cpu variable) */ | 816 | const struct cpu_key *p_cpu_key, /* Key to search (cpu variable) */ |
785 | struct path * p_s_search_path /* Filled up by this function. */ | 817 | struct path *p_s_search_path /* Filled up by this function. */ |
786 | ) { | 818 | ) |
787 | struct item_head * p_le_ih; /* pointer to on-disk structure */ | 819 | { |
788 | int n_blk_size; | 820 | struct item_head *p_le_ih; /* pointer to on-disk structure */ |
789 | loff_t item_offset, offset; | 821 | int n_blk_size; |
790 | struct reiserfs_dir_entry de; | 822 | loff_t item_offset, offset; |
791 | int retval; | 823 | struct reiserfs_dir_entry de; |
792 | 824 | int retval; | |
793 | /* If searching for directory entry. */ | 825 | |
794 | if ( is_direntry_cpu_key (p_cpu_key) ) | 826 | /* If searching for directory entry. */ |
795 | return search_by_entry_key (p_s_sb, p_cpu_key, p_s_search_path, &de); | 827 | if (is_direntry_cpu_key(p_cpu_key)) |
796 | 828 | return search_by_entry_key(p_s_sb, p_cpu_key, p_s_search_path, | |
797 | /* If not searching for directory entry. */ | 829 | &de); |
798 | 830 | ||
799 | /* If item is found. */ | 831 | /* If not searching for directory entry. */ |
800 | retval = search_item (p_s_sb, p_cpu_key, p_s_search_path); | 832 | |
801 | if (retval == IO_ERROR) | 833 | /* If item is found. */ |
802 | return retval; | 834 | retval = search_item(p_s_sb, p_cpu_key, p_s_search_path); |
803 | if ( retval == ITEM_FOUND ) { | 835 | if (retval == IO_ERROR) |
804 | 836 | return retval; | |
805 | RFALSE( ! ih_item_len( | 837 | if (retval == ITEM_FOUND) { |
806 | B_N_PITEM_HEAD(PATH_PLAST_BUFFER(p_s_search_path), | ||
807 | PATH_LAST_POSITION(p_s_search_path))), | ||
808 | "PAP-5165: item length equals zero"); | ||
809 | 838 | ||
810 | pos_in_item(p_s_search_path) = 0; | 839 | RFALSE(!ih_item_len |
811 | return POSITION_FOUND; | 840 | (B_N_PITEM_HEAD |
812 | } | 841 | (PATH_PLAST_BUFFER(p_s_search_path), |
842 | PATH_LAST_POSITION(p_s_search_path))), | ||
843 | "PAP-5165: item length equals zero"); | ||
813 | 844 | ||
814 | RFALSE( ! PATH_LAST_POSITION(p_s_search_path), | 845 | pos_in_item(p_s_search_path) = 0; |
815 | "PAP-5170: position equals zero"); | 846 | return POSITION_FOUND; |
847 | } | ||
816 | 848 | ||
817 | /* Item is not found. Set path to the previous item. */ | 849 | RFALSE(!PATH_LAST_POSITION(p_s_search_path), |
818 | p_le_ih = B_N_PITEM_HEAD(PATH_PLAST_BUFFER(p_s_search_path), --PATH_LAST_POSITION(p_s_search_path)); | 850 | "PAP-5170: position equals zero"); |
819 | n_blk_size = p_s_sb->s_blocksize; | ||
820 | 851 | ||
821 | if (comp_short_keys (&(p_le_ih->ih_key), p_cpu_key)) { | 852 | /* Item is not found. Set path to the previous item. */ |
822 | return FILE_NOT_FOUND; | 853 | p_le_ih = |
823 | } | 854 | B_N_PITEM_HEAD(PATH_PLAST_BUFFER(p_s_search_path), |
855 | --PATH_LAST_POSITION(p_s_search_path)); | ||
856 | n_blk_size = p_s_sb->s_blocksize; | ||
824 | 857 | ||
825 | // FIXME: quite ugly this far | 858 | if (comp_short_keys(&(p_le_ih->ih_key), p_cpu_key)) { |
859 | return FILE_NOT_FOUND; | ||
860 | } | ||
861 | // FIXME: quite ugly this far | ||
826 | 862 | ||
827 | item_offset = le_ih_k_offset (p_le_ih); | 863 | item_offset = le_ih_k_offset(p_le_ih); |
828 | offset = cpu_key_k_offset (p_cpu_key); | 864 | offset = cpu_key_k_offset(p_cpu_key); |
829 | 865 | ||
830 | /* Needed byte is contained in the item pointed to by the path.*/ | 866 | /* Needed byte is contained in the item pointed to by the path. */ |
831 | if (item_offset <= offset && | 867 | if (item_offset <= offset && |
832 | item_offset + op_bytes_number (p_le_ih, n_blk_size) > offset) { | 868 | item_offset + op_bytes_number(p_le_ih, n_blk_size) > offset) { |
833 | pos_in_item (p_s_search_path) = offset - item_offset; | 869 | pos_in_item(p_s_search_path) = offset - item_offset; |
834 | if ( is_indirect_le_ih(p_le_ih) ) { | 870 | if (is_indirect_le_ih(p_le_ih)) { |
835 | pos_in_item (p_s_search_path) /= n_blk_size; | 871 | pos_in_item(p_s_search_path) /= n_blk_size; |
872 | } | ||
873 | return POSITION_FOUND; | ||
836 | } | 874 | } |
837 | return POSITION_FOUND; | ||
838 | } | ||
839 | |||
840 | /* Needed byte is not contained in the item pointed to by the | ||
841 | path. Set pos_in_item out of the item. */ | ||
842 | if ( is_indirect_le_ih (p_le_ih) ) | ||
843 | pos_in_item (p_s_search_path) = ih_item_len(p_le_ih) / UNFM_P_SIZE; | ||
844 | else | ||
845 | pos_in_item (p_s_search_path) = ih_item_len( p_le_ih ); | ||
846 | |||
847 | return POSITION_NOT_FOUND; | ||
848 | } | ||
849 | 875 | ||
876 | /* Needed byte is not contained in the item pointed to by the | ||
877 | path. Set pos_in_item out of the item. */ | ||
878 | if (is_indirect_le_ih(p_le_ih)) | ||
879 | pos_in_item(p_s_search_path) = | ||
880 | ih_item_len(p_le_ih) / UNFM_P_SIZE; | ||
881 | else | ||
882 | pos_in_item(p_s_search_path) = ih_item_len(p_le_ih); | ||
883 | |||
884 | return POSITION_NOT_FOUND; | ||
885 | } | ||
850 | 886 | ||
851 | /* Compare given item and item pointed to by the path. */ | 887 | /* Compare given item and item pointed to by the path. */ |
852 | int comp_items (const struct item_head * stored_ih, const struct path * p_s_path) | 888 | int comp_items(const struct item_head *stored_ih, const struct path *p_s_path) |
853 | { | 889 | { |
854 | struct buffer_head * p_s_bh; | 890 | struct buffer_head *p_s_bh; |
855 | struct item_head * ih; | 891 | struct item_head *ih; |
856 | 892 | ||
857 | /* Last buffer at the path is not in the tree. */ | 893 | /* Last buffer at the path is not in the tree. */ |
858 | if ( ! B_IS_IN_TREE(p_s_bh = PATH_PLAST_BUFFER(p_s_path)) ) | 894 | if (!B_IS_IN_TREE(p_s_bh = PATH_PLAST_BUFFER(p_s_path))) |
859 | return 1; | 895 | return 1; |
860 | 896 | ||
861 | /* Last path position is invalid. */ | 897 | /* Last path position is invalid. */ |
862 | if ( PATH_LAST_POSITION(p_s_path) >= B_NR_ITEMS(p_s_bh) ) | 898 | if (PATH_LAST_POSITION(p_s_path) >= B_NR_ITEMS(p_s_bh)) |
863 | return 1; | 899 | return 1; |
864 | 900 | ||
865 | /* we need only to know, whether it is the same item */ | 901 | /* we need only to know, whether it is the same item */ |
866 | ih = get_ih (p_s_path); | 902 | ih = get_ih(p_s_path); |
867 | return memcmp (stored_ih, ih, IH_SIZE); | 903 | return memcmp(stored_ih, ih, IH_SIZE); |
868 | } | 904 | } |
869 | 905 | ||
870 | |||
871 | /* unformatted nodes are not logged anymore, ever. This is safe | 906 | /* unformatted nodes are not logged anymore, ever. This is safe |
872 | ** now | 907 | ** now |
873 | */ | 908 | */ |
@@ -876,461 +911,466 @@ int comp_items (const struct item_head * stored_ih, const struct path * p_s_path | |||
876 | // block can not be forgotten as it is in I/O or held by someone | 911 | // block can not be forgotten as it is in I/O or held by someone |
877 | #define block_in_use(bh) (buffer_locked(bh) || (held_by_others(bh))) | 912 | #define block_in_use(bh) (buffer_locked(bh) || (held_by_others(bh))) |
878 | 913 | ||
879 | |||
880 | |||
881 | // prepare for delete or cut of direct item | 914 | // prepare for delete or cut of direct item |
882 | static inline int prepare_for_direct_item (struct path * path, | 915 | static inline int prepare_for_direct_item(struct path *path, |
883 | struct item_head * le_ih, | 916 | struct item_head *le_ih, |
884 | struct inode * inode, | 917 | struct inode *inode, |
885 | loff_t new_file_length, | 918 | loff_t new_file_length, int *cut_size) |
886 | int * cut_size) | ||
887 | { | 919 | { |
888 | loff_t round_len; | 920 | loff_t round_len; |
889 | 921 | ||
890 | 922 | if (new_file_length == max_reiserfs_offset(inode)) { | |
891 | if ( new_file_length == max_reiserfs_offset (inode) ) { | 923 | /* item has to be deleted */ |
892 | /* item has to be deleted */ | 924 | *cut_size = -(IH_SIZE + ih_item_len(le_ih)); |
893 | *cut_size = -(IH_SIZE + ih_item_len(le_ih)); | 925 | return M_DELETE; |
894 | return M_DELETE; | 926 | } |
895 | } | 927 | // new file gets truncated |
896 | 928 | if (get_inode_item_key_version(inode) == KEY_FORMAT_3_6) { | |
897 | // new file gets truncated | 929 | // |
898 | if (get_inode_item_key_version (inode) == KEY_FORMAT_3_6) { | 930 | round_len = ROUND_UP(new_file_length); |
899 | // | 931 | /* this was n_new_file_length < le_ih ... */ |
900 | round_len = ROUND_UP (new_file_length); | 932 | if (round_len < le_ih_k_offset(le_ih)) { |
901 | /* this was n_new_file_length < le_ih ... */ | 933 | *cut_size = -(IH_SIZE + ih_item_len(le_ih)); |
902 | if ( round_len < le_ih_k_offset (le_ih) ) { | 934 | return M_DELETE; /* Delete this item. */ |
903 | *cut_size = -(IH_SIZE + ih_item_len(le_ih)); | 935 | } |
904 | return M_DELETE; /* Delete this item. */ | 936 | /* Calculate first position and size for cutting from item. */ |
937 | pos_in_item(path) = round_len - (le_ih_k_offset(le_ih) - 1); | ||
938 | *cut_size = -(ih_item_len(le_ih) - pos_in_item(path)); | ||
939 | |||
940 | return M_CUT; /* Cut from this item. */ | ||
941 | } | ||
942 | |||
943 | // old file: items may have any length | ||
944 | |||
945 | if (new_file_length < le_ih_k_offset(le_ih)) { | ||
946 | *cut_size = -(IH_SIZE + ih_item_len(le_ih)); | ||
947 | return M_DELETE; /* Delete this item. */ | ||
905 | } | 948 | } |
906 | /* Calculate first position and size for cutting from item. */ | 949 | /* Calculate first position and size for cutting from item. */ |
907 | pos_in_item (path) = round_len - (le_ih_k_offset (le_ih) - 1); | 950 | *cut_size = -(ih_item_len(le_ih) - |
908 | *cut_size = -(ih_item_len(le_ih) - pos_in_item(path)); | 951 | (pos_in_item(path) = |
909 | 952 | new_file_length + 1 - le_ih_k_offset(le_ih))); | |
910 | return M_CUT; /* Cut from this item. */ | 953 | return M_CUT; /* Cut from this item. */ |
911 | } | ||
912 | |||
913 | |||
914 | // old file: items may have any length | ||
915 | |||
916 | if ( new_file_length < le_ih_k_offset (le_ih) ) { | ||
917 | *cut_size = -(IH_SIZE + ih_item_len(le_ih)); | ||
918 | return M_DELETE; /* Delete this item. */ | ||
919 | } | ||
920 | /* Calculate first position and size for cutting from item. */ | ||
921 | *cut_size = -(ih_item_len(le_ih) - | ||
922 | (pos_in_item (path) = new_file_length + 1 - le_ih_k_offset (le_ih))); | ||
923 | return M_CUT; /* Cut from this item. */ | ||
924 | } | 954 | } |
925 | 955 | ||
926 | 956 | static inline int prepare_for_direntry_item(struct path *path, | |
927 | static inline int prepare_for_direntry_item (struct path * path, | 957 | struct item_head *le_ih, |
928 | struct item_head * le_ih, | 958 | struct inode *inode, |
929 | struct inode * inode, | 959 | loff_t new_file_length, |
930 | loff_t new_file_length, | 960 | int *cut_size) |
931 | int * cut_size) | ||
932 | { | 961 | { |
933 | if (le_ih_k_offset (le_ih) == DOT_OFFSET && | 962 | if (le_ih_k_offset(le_ih) == DOT_OFFSET && |
934 | new_file_length == max_reiserfs_offset (inode)) { | 963 | new_file_length == max_reiserfs_offset(inode)) { |
935 | RFALSE( ih_entry_count (le_ih) != 2, | 964 | RFALSE(ih_entry_count(le_ih) != 2, |
936 | "PAP-5220: incorrect empty directory item (%h)", le_ih); | 965 | "PAP-5220: incorrect empty directory item (%h)", le_ih); |
937 | *cut_size = -(IH_SIZE + ih_item_len(le_ih)); | 966 | *cut_size = -(IH_SIZE + ih_item_len(le_ih)); |
938 | return M_DELETE; /* Delete the directory item containing "." and ".." entry. */ | 967 | return M_DELETE; /* Delete the directory item containing "." and ".." entry. */ |
939 | } | 968 | } |
940 | |||
941 | if ( ih_entry_count (le_ih) == 1 ) { | ||
942 | /* Delete the directory item such as there is one record only | ||
943 | in this item*/ | ||
944 | *cut_size = -(IH_SIZE + ih_item_len(le_ih)); | ||
945 | return M_DELETE; | ||
946 | } | ||
947 | |||
948 | /* Cut one record from the directory item. */ | ||
949 | *cut_size = -(DEH_SIZE + entry_length (get_last_bh (path), le_ih, pos_in_item (path))); | ||
950 | return M_CUT; | ||
951 | } | ||
952 | 969 | ||
970 | if (ih_entry_count(le_ih) == 1) { | ||
971 | /* Delete the directory item such as there is one record only | ||
972 | in this item */ | ||
973 | *cut_size = -(IH_SIZE + ih_item_len(le_ih)); | ||
974 | return M_DELETE; | ||
975 | } | ||
976 | |||
977 | /* Cut one record from the directory item. */ | ||
978 | *cut_size = | ||
979 | -(DEH_SIZE + | ||
980 | entry_length(get_last_bh(path), le_ih, pos_in_item(path))); | ||
981 | return M_CUT; | ||
982 | } | ||
953 | 983 | ||
954 | /* If the path points to a directory or direct item, calculate mode and the size cut, for balance. | 984 | /* If the path points to a directory or direct item, calculate mode and the size cut, for balance. |
955 | If the path points to an indirect item, remove some number of its unformatted nodes. | 985 | If the path points to an indirect item, remove some number of its unformatted nodes. |
956 | In case of file truncate calculate whether this item must be deleted/truncated or last | 986 | In case of file truncate calculate whether this item must be deleted/truncated or last |
957 | unformatted node of this item will be converted to a direct item. | 987 | unformatted node of this item will be converted to a direct item. |
958 | This function returns a determination of what balance mode the calling function should employ. */ | 988 | This function returns a determination of what balance mode the calling function should employ. */ |
959 | static char prepare_for_delete_or_cut( | 989 | static char prepare_for_delete_or_cut(struct reiserfs_transaction_handle *th, struct inode *inode, struct path *p_s_path, const struct cpu_key *p_s_item_key, int *p_n_removed, /* Number of unformatted nodes which were removed |
960 | struct reiserfs_transaction_handle *th, | 990 | from end of the file. */ |
961 | struct inode * inode, | 991 | int *p_n_cut_size, unsigned long long n_new_file_length /* MAX_KEY_OFFSET in case of delete. */ |
962 | struct path * p_s_path, | 992 | ) |
963 | const struct cpu_key * p_s_item_key, | 993 | { |
964 | int * p_n_removed, /* Number of unformatted nodes which were removed | 994 | struct super_block *p_s_sb = inode->i_sb; |
965 | from end of the file. */ | 995 | struct item_head *p_le_ih = PATH_PITEM_HEAD(p_s_path); |
966 | int * p_n_cut_size, | 996 | struct buffer_head *p_s_bh = PATH_PLAST_BUFFER(p_s_path); |
967 | unsigned long long n_new_file_length /* MAX_KEY_OFFSET in case of delete. */ | ||
968 | ) { | ||
969 | struct super_block * p_s_sb = inode->i_sb; | ||
970 | struct item_head * p_le_ih = PATH_PITEM_HEAD(p_s_path); | ||
971 | struct buffer_head * p_s_bh = PATH_PLAST_BUFFER(p_s_path); | ||
972 | |||
973 | BUG_ON (!th->t_trans_id); | ||
974 | |||
975 | /* Stat_data item. */ | ||
976 | if ( is_statdata_le_ih (p_le_ih) ) { | ||
977 | |||
978 | RFALSE( n_new_file_length != max_reiserfs_offset (inode), | ||
979 | "PAP-5210: mode must be M_DELETE"); | ||
980 | |||
981 | *p_n_cut_size = -(IH_SIZE + ih_item_len(p_le_ih)); | ||
982 | return M_DELETE; | ||
983 | } | ||
984 | |||
985 | |||
986 | /* Directory item. */ | ||
987 | if ( is_direntry_le_ih (p_le_ih) ) | ||
988 | return prepare_for_direntry_item (p_s_path, p_le_ih, inode, n_new_file_length, p_n_cut_size); | ||
989 | |||
990 | /* Direct item. */ | ||
991 | if ( is_direct_le_ih (p_le_ih) ) | ||
992 | return prepare_for_direct_item (p_s_path, p_le_ih, inode, n_new_file_length, p_n_cut_size); | ||
993 | |||
994 | |||
995 | /* Case of an indirect item. */ | ||
996 | { | ||
997 | int n_unfm_number, /* Number of the item unformatted nodes. */ | ||
998 | n_counter, | ||
999 | n_blk_size; | ||
1000 | __le32 * p_n_unfm_pointer; /* Pointer to the unformatted node number. */ | ||
1001 | __u32 tmp; | ||
1002 | struct item_head s_ih; /* Item header. */ | ||
1003 | char c_mode; /* Returned mode of the balance. */ | ||
1004 | int need_research; | ||
1005 | 997 | ||
998 | BUG_ON(!th->t_trans_id); | ||
1006 | 999 | ||
1007 | n_blk_size = p_s_sb->s_blocksize; | 1000 | /* Stat_data item. */ |
1001 | if (is_statdata_le_ih(p_le_ih)) { | ||
1008 | 1002 | ||
1009 | /* Search for the needed object indirect item until there are no unformatted nodes to be removed. */ | 1003 | RFALSE(n_new_file_length != max_reiserfs_offset(inode), |
1010 | do { | 1004 | "PAP-5210: mode must be M_DELETE"); |
1011 | need_research = 0; | ||
1012 | p_s_bh = PATH_PLAST_BUFFER(p_s_path); | ||
1013 | /* Copy indirect item header to a temp variable. */ | ||
1014 | copy_item_head(&s_ih, PATH_PITEM_HEAD(p_s_path)); | ||
1015 | /* Calculate number of unformatted nodes in this item. */ | ||
1016 | n_unfm_number = I_UNFM_NUM(&s_ih); | ||
1017 | |||
1018 | RFALSE( ! is_indirect_le_ih(&s_ih) || ! n_unfm_number || | ||
1019 | pos_in_item (p_s_path) + 1 != n_unfm_number, | ||
1020 | "PAP-5240: invalid item %h " | ||
1021 | "n_unfm_number = %d *p_n_pos_in_item = %d", | ||
1022 | &s_ih, n_unfm_number, pos_in_item (p_s_path)); | ||
1023 | |||
1024 | /* Calculate balance mode and position in the item to remove unformatted nodes. */ | ||
1025 | if ( n_new_file_length == max_reiserfs_offset (inode) ) {/* Case of delete. */ | ||
1026 | pos_in_item (p_s_path) = 0; | ||
1027 | *p_n_cut_size = -(IH_SIZE + ih_item_len(&s_ih)); | ||
1028 | c_mode = M_DELETE; | ||
1029 | } | ||
1030 | else { /* Case of truncate. */ | ||
1031 | if ( n_new_file_length < le_ih_k_offset (&s_ih) ) { | ||
1032 | pos_in_item (p_s_path) = 0; | ||
1033 | *p_n_cut_size = -(IH_SIZE + ih_item_len(&s_ih)); | ||
1034 | c_mode = M_DELETE; /* Delete this item. */ | ||
1035 | } | ||
1036 | else { | ||
1037 | /* indirect item must be truncated starting from *p_n_pos_in_item-th position */ | ||
1038 | pos_in_item (p_s_path) = (n_new_file_length + n_blk_size - le_ih_k_offset (&s_ih) ) >> p_s_sb->s_blocksize_bits; | ||
1039 | |||
1040 | RFALSE( pos_in_item (p_s_path) > n_unfm_number, | ||
1041 | "PAP-5250: invalid position in the item"); | ||
1042 | |||
1043 | /* Either convert last unformatted node of indirect item to direct item or increase | ||
1044 | its free space. */ | ||
1045 | if ( pos_in_item (p_s_path) == n_unfm_number ) { | ||
1046 | *p_n_cut_size = 0; /* Nothing to cut. */ | ||
1047 | return M_CONVERT; /* Maybe convert last unformatted node to the direct item. */ | ||
1048 | } | ||
1049 | /* Calculate size to cut. */ | ||
1050 | *p_n_cut_size = -(ih_item_len(&s_ih) - pos_in_item(p_s_path) * UNFM_P_SIZE); | ||
1051 | |||
1052 | c_mode = M_CUT; /* Cut from this indirect item. */ | ||
1053 | } | ||
1054 | } | ||
1055 | |||
1056 | RFALSE( n_unfm_number <= pos_in_item (p_s_path), | ||
1057 | "PAP-5260: invalid position in the indirect item"); | ||
1058 | |||
1059 | /* pointers to be cut */ | ||
1060 | n_unfm_number -= pos_in_item (p_s_path); | ||
1061 | /* Set pointer to the last unformatted node pointer that is to be cut. */ | ||
1062 | p_n_unfm_pointer = (__le32 *)B_I_PITEM(p_s_bh, &s_ih) + I_UNFM_NUM(&s_ih) - 1 - *p_n_removed; | ||
1063 | |||
1064 | |||
1065 | /* We go through the unformatted nodes pointers of the indirect | ||
1066 | item and look for the unformatted nodes in the cache. If we | ||
1067 | found some of them we free it, zero corresponding indirect item | ||
1068 | entry and log buffer containing that indirect item. For this we | ||
1069 | need to prepare last path element for logging. If some | ||
1070 | unformatted node has b_count > 1 we must not free this | ||
1071 | unformatted node since it is in use. */ | ||
1072 | reiserfs_prepare_for_journal(p_s_sb, p_s_bh, 1); | ||
1073 | // note: path could be changed, first line in for loop takes care | ||
1074 | // of it | ||
1075 | |||
1076 | for (n_counter = *p_n_removed; | ||
1077 | n_counter < n_unfm_number; n_counter++, p_n_unfm_pointer-- ) { | ||
1078 | |||
1079 | cond_resched(); | ||
1080 | if (item_moved (&s_ih, p_s_path)) { | ||
1081 | need_research = 1 ; | ||
1082 | break; | ||
1083 | } | ||
1084 | RFALSE( p_n_unfm_pointer < (__le32 *)B_I_PITEM(p_s_bh, &s_ih) || | ||
1085 | p_n_unfm_pointer > (__le32 *)B_I_PITEM(p_s_bh, &s_ih) + I_UNFM_NUM(&s_ih) - 1, | ||
1086 | "vs-5265: pointer out of range"); | ||
1087 | 1005 | ||
1088 | /* Hole, nothing to remove. */ | 1006 | *p_n_cut_size = -(IH_SIZE + ih_item_len(p_le_ih)); |
1089 | if ( ! get_block_num(p_n_unfm_pointer,0) ) { | 1007 | return M_DELETE; |
1090 | (*p_n_removed)++; | 1008 | } |
1091 | continue; | ||
1092 | } | ||
1093 | 1009 | ||
1094 | (*p_n_removed)++; | 1010 | /* Directory item. */ |
1011 | if (is_direntry_le_ih(p_le_ih)) | ||
1012 | return prepare_for_direntry_item(p_s_path, p_le_ih, inode, | ||
1013 | n_new_file_length, | ||
1014 | p_n_cut_size); | ||
1095 | 1015 | ||
1096 | tmp = get_block_num(p_n_unfm_pointer,0); | 1016 | /* Direct item. */ |
1097 | put_block_num(p_n_unfm_pointer, 0, 0); | 1017 | if (is_direct_le_ih(p_le_ih)) |
1098 | journal_mark_dirty (th, p_s_sb, p_s_bh); | 1018 | return prepare_for_direct_item(p_s_path, p_le_ih, inode, |
1099 | reiserfs_free_block(th, inode, tmp, 1); | 1019 | n_new_file_length, p_n_cut_size); |
1100 | if ( item_moved (&s_ih, p_s_path) ) { | 1020 | |
1101 | need_research = 1; | 1021 | /* Case of an indirect item. */ |
1102 | break ; | 1022 | { |
1103 | } | 1023 | int n_unfm_number, /* Number of the item unformatted nodes. */ |
1104 | } | 1024 | n_counter, n_blk_size; |
1105 | 1025 | __le32 *p_n_unfm_pointer; /* Pointer to the unformatted node number. */ | |
1106 | /* a trick. If the buffer has been logged, this | 1026 | __u32 tmp; |
1107 | ** will do nothing. If we've broken the loop without | 1027 | struct item_head s_ih; /* Item header. */ |
1108 | ** logging it, it will restore the buffer | 1028 | char c_mode; /* Returned mode of the balance. */ |
1109 | ** | 1029 | int need_research; |
1110 | */ | 1030 | |
1111 | reiserfs_restore_prepared_buffer(p_s_sb, p_s_bh); | 1031 | n_blk_size = p_s_sb->s_blocksize; |
1112 | 1032 | ||
1113 | /* This loop can be optimized. */ | 1033 | /* Search for the needed object indirect item until there are no unformatted nodes to be removed. */ |
1114 | } while ( (*p_n_removed < n_unfm_number || need_research) && | 1034 | do { |
1115 | search_for_position_by_key(p_s_sb, p_s_item_key, p_s_path) == POSITION_FOUND ); | 1035 | need_research = 0; |
1116 | 1036 | p_s_bh = PATH_PLAST_BUFFER(p_s_path); | |
1117 | RFALSE( *p_n_removed < n_unfm_number, | 1037 | /* Copy indirect item header to a temp variable. */ |
1118 | "PAP-5310: indirect item is not found"); | 1038 | copy_item_head(&s_ih, PATH_PITEM_HEAD(p_s_path)); |
1119 | RFALSE( item_moved (&s_ih, p_s_path), | 1039 | /* Calculate number of unformatted nodes in this item. */ |
1120 | "after while, comp failed, retry") ; | 1040 | n_unfm_number = I_UNFM_NUM(&s_ih); |
1121 | 1041 | ||
1122 | if (c_mode == M_CUT) | 1042 | RFALSE(!is_indirect_le_ih(&s_ih) || !n_unfm_number || |
1123 | pos_in_item (p_s_path) *= UNFM_P_SIZE; | 1043 | pos_in_item(p_s_path) + 1 != n_unfm_number, |
1124 | return c_mode; | 1044 | "PAP-5240: invalid item %h " |
1125 | } | 1045 | "n_unfm_number = %d *p_n_pos_in_item = %d", |
1046 | &s_ih, n_unfm_number, pos_in_item(p_s_path)); | ||
1047 | |||
1048 | /* Calculate balance mode and position in the item to remove unformatted nodes. */ | ||
1049 | if (n_new_file_length == max_reiserfs_offset(inode)) { /* Case of delete. */ | ||
1050 | pos_in_item(p_s_path) = 0; | ||
1051 | *p_n_cut_size = -(IH_SIZE + ih_item_len(&s_ih)); | ||
1052 | c_mode = M_DELETE; | ||
1053 | } else { /* Case of truncate. */ | ||
1054 | if (n_new_file_length < le_ih_k_offset(&s_ih)) { | ||
1055 | pos_in_item(p_s_path) = 0; | ||
1056 | *p_n_cut_size = | ||
1057 | -(IH_SIZE + ih_item_len(&s_ih)); | ||
1058 | c_mode = M_DELETE; /* Delete this item. */ | ||
1059 | } else { | ||
1060 | /* indirect item must be truncated starting from *p_n_pos_in_item-th position */ | ||
1061 | pos_in_item(p_s_path) = | ||
1062 | (n_new_file_length + n_blk_size - | ||
1063 | le_ih_k_offset(&s_ih)) >> p_s_sb-> | ||
1064 | s_blocksize_bits; | ||
1065 | |||
1066 | RFALSE(pos_in_item(p_s_path) > | ||
1067 | n_unfm_number, | ||
1068 | "PAP-5250: invalid position in the item"); | ||
1069 | |||
1070 | /* Either convert last unformatted node of indirect item to direct item or increase | ||
1071 | its free space. */ | ||
1072 | if (pos_in_item(p_s_path) == | ||
1073 | n_unfm_number) { | ||
1074 | *p_n_cut_size = 0; /* Nothing to cut. */ | ||
1075 | return M_CONVERT; /* Maybe convert last unformatted node to the direct item. */ | ||
1076 | } | ||
1077 | /* Calculate size to cut. */ | ||
1078 | *p_n_cut_size = | ||
1079 | -(ih_item_len(&s_ih) - | ||
1080 | pos_in_item(p_s_path) * | ||
1081 | UNFM_P_SIZE); | ||
1082 | |||
1083 | c_mode = M_CUT; /* Cut from this indirect item. */ | ||
1084 | } | ||
1085 | } | ||
1086 | |||
1087 | RFALSE(n_unfm_number <= pos_in_item(p_s_path), | ||
1088 | "PAP-5260: invalid position in the indirect item"); | ||
1089 | |||
1090 | /* pointers to be cut */ | ||
1091 | n_unfm_number -= pos_in_item(p_s_path); | ||
1092 | /* Set pointer to the last unformatted node pointer that is to be cut. */ | ||
1093 | p_n_unfm_pointer = | ||
1094 | (__le32 *) B_I_PITEM(p_s_bh, | ||
1095 | &s_ih) + I_UNFM_NUM(&s_ih) - | ||
1096 | 1 - *p_n_removed; | ||
1097 | |||
1098 | /* We go through the unformatted nodes pointers of the indirect | ||
1099 | item and look for the unformatted nodes in the cache. If we | ||
1100 | found some of them we free it, zero corresponding indirect item | ||
1101 | entry and log buffer containing that indirect item. For this we | ||
1102 | need to prepare last path element for logging. If some | ||
1103 | unformatted node has b_count > 1 we must not free this | ||
1104 | unformatted node since it is in use. */ | ||
1105 | reiserfs_prepare_for_journal(p_s_sb, p_s_bh, 1); | ||
1106 | // note: path could be changed, first line in for loop takes care | ||
1107 | // of it | ||
1108 | |||
1109 | for (n_counter = *p_n_removed; | ||
1110 | n_counter < n_unfm_number; | ||
1111 | n_counter++, p_n_unfm_pointer--) { | ||
1112 | |||
1113 | cond_resched(); | ||
1114 | if (item_moved(&s_ih, p_s_path)) { | ||
1115 | need_research = 1; | ||
1116 | break; | ||
1117 | } | ||
1118 | RFALSE(p_n_unfm_pointer < | ||
1119 | (__le32 *) B_I_PITEM(p_s_bh, &s_ih) | ||
1120 | || p_n_unfm_pointer > | ||
1121 | (__le32 *) B_I_PITEM(p_s_bh, | ||
1122 | &s_ih) + | ||
1123 | I_UNFM_NUM(&s_ih) - 1, | ||
1124 | "vs-5265: pointer out of range"); | ||
1125 | |||
1126 | /* Hole, nothing to remove. */ | ||
1127 | if (!get_block_num(p_n_unfm_pointer, 0)) { | ||
1128 | (*p_n_removed)++; | ||
1129 | continue; | ||
1130 | } | ||
1131 | |||
1132 | (*p_n_removed)++; | ||
1133 | |||
1134 | tmp = get_block_num(p_n_unfm_pointer, 0); | ||
1135 | put_block_num(p_n_unfm_pointer, 0, 0); | ||
1136 | journal_mark_dirty(th, p_s_sb, p_s_bh); | ||
1137 | reiserfs_free_block(th, inode, tmp, 1); | ||
1138 | if (item_moved(&s_ih, p_s_path)) { | ||
1139 | need_research = 1; | ||
1140 | break; | ||
1141 | } | ||
1142 | } | ||
1143 | |||
1144 | /* a trick. If the buffer has been logged, this | ||
1145 | ** will do nothing. If we've broken the loop without | ||
1146 | ** logging it, it will restore the buffer | ||
1147 | ** | ||
1148 | */ | ||
1149 | reiserfs_restore_prepared_buffer(p_s_sb, p_s_bh); | ||
1150 | |||
1151 | /* This loop can be optimized. */ | ||
1152 | } while ((*p_n_removed < n_unfm_number || need_research) && | ||
1153 | search_for_position_by_key(p_s_sb, p_s_item_key, | ||
1154 | p_s_path) == | ||
1155 | POSITION_FOUND); | ||
1156 | |||
1157 | RFALSE(*p_n_removed < n_unfm_number, | ||
1158 | "PAP-5310: indirect item is not found"); | ||
1159 | RFALSE(item_moved(&s_ih, p_s_path), | ||
1160 | "after while, comp failed, retry"); | ||
1161 | |||
1162 | if (c_mode == M_CUT) | ||
1163 | pos_in_item(p_s_path) *= UNFM_P_SIZE; | ||
1164 | return c_mode; | ||
1165 | } | ||
1126 | } | 1166 | } |
1127 | 1167 | ||
1128 | /* Calculate number of bytes which will be deleted or cut during balance */ | 1168 | /* Calculate number of bytes which will be deleted or cut during balance */ |
1129 | static int calc_deleted_bytes_number( | 1169 | static int calc_deleted_bytes_number(struct tree_balance *p_s_tb, char c_mode) |
1130 | struct tree_balance * p_s_tb, | 1170 | { |
1131 | char c_mode | 1171 | int n_del_size; |
1132 | ) { | 1172 | struct item_head *p_le_ih = PATH_PITEM_HEAD(p_s_tb->tb_path); |
1133 | int n_del_size; | 1173 | |
1134 | struct item_head * p_le_ih = PATH_PITEM_HEAD(p_s_tb->tb_path); | 1174 | if (is_statdata_le_ih(p_le_ih)) |
1135 | 1175 | return 0; | |
1136 | if ( is_statdata_le_ih (p_le_ih) ) | 1176 | |
1137 | return 0; | 1177 | n_del_size = |
1178 | (c_mode == | ||
1179 | M_DELETE) ? ih_item_len(p_le_ih) : -p_s_tb->insert_size[0]; | ||
1180 | if (is_direntry_le_ih(p_le_ih)) { | ||
1181 | // return EMPTY_DIR_SIZE; /* We delete emty directoris only. */ | ||
1182 | // we can't use EMPTY_DIR_SIZE, as old format dirs have a different | ||
1183 | // empty size. ick. FIXME, is this right? | ||
1184 | // | ||
1185 | return n_del_size; | ||
1186 | } | ||
1138 | 1187 | ||
1139 | n_del_size = ( c_mode == M_DELETE ) ? ih_item_len(p_le_ih) : -p_s_tb->insert_size[0]; | 1188 | if (is_indirect_le_ih(p_le_ih)) |
1140 | if ( is_direntry_le_ih (p_le_ih) ) { | 1189 | n_del_size = (n_del_size / UNFM_P_SIZE) * (PATH_PLAST_BUFFER(p_s_tb->tb_path)->b_size); // - get_ih_free_space (p_le_ih); |
1141 | // return EMPTY_DIR_SIZE; /* We delete emty directoris only. */ | 1190 | return n_del_size; |
1142 | // we can't use EMPTY_DIR_SIZE, as old format dirs have a different | ||
1143 | // empty size. ick. FIXME, is this right? | ||
1144 | // | ||
1145 | return n_del_size ; | ||
1146 | } | ||
1147 | |||
1148 | if ( is_indirect_le_ih (p_le_ih) ) | ||
1149 | n_del_size = (n_del_size/UNFM_P_SIZE)* | ||
1150 | (PATH_PLAST_BUFFER(p_s_tb->tb_path)->b_size);// - get_ih_free_space (p_le_ih); | ||
1151 | return n_del_size; | ||
1152 | } | 1191 | } |
1153 | 1192 | ||
1154 | static void init_tb_struct( | 1193 | static void init_tb_struct(struct reiserfs_transaction_handle *th, |
1155 | struct reiserfs_transaction_handle *th, | 1194 | struct tree_balance *p_s_tb, |
1156 | struct tree_balance * p_s_tb, | 1195 | struct super_block *p_s_sb, |
1157 | struct super_block * p_s_sb, | 1196 | struct path *p_s_path, int n_size) |
1158 | struct path * p_s_path, | 1197 | { |
1159 | int n_size | ||
1160 | ) { | ||
1161 | |||
1162 | BUG_ON (!th->t_trans_id); | ||
1163 | |||
1164 | memset (p_s_tb,'\0',sizeof(struct tree_balance)); | ||
1165 | p_s_tb->transaction_handle = th ; | ||
1166 | p_s_tb->tb_sb = p_s_sb; | ||
1167 | p_s_tb->tb_path = p_s_path; | ||
1168 | PATH_OFFSET_PBUFFER(p_s_path, ILLEGAL_PATH_ELEMENT_OFFSET) = NULL; | ||
1169 | PATH_OFFSET_POSITION(p_s_path, ILLEGAL_PATH_ELEMENT_OFFSET) = 0; | ||
1170 | p_s_tb->insert_size[0] = n_size; | ||
1171 | } | ||
1172 | 1198 | ||
1199 | BUG_ON(!th->t_trans_id); | ||
1173 | 1200 | ||
1201 | memset(p_s_tb, '\0', sizeof(struct tree_balance)); | ||
1202 | p_s_tb->transaction_handle = th; | ||
1203 | p_s_tb->tb_sb = p_s_sb; | ||
1204 | p_s_tb->tb_path = p_s_path; | ||
1205 | PATH_OFFSET_PBUFFER(p_s_path, ILLEGAL_PATH_ELEMENT_OFFSET) = NULL; | ||
1206 | PATH_OFFSET_POSITION(p_s_path, ILLEGAL_PATH_ELEMENT_OFFSET) = 0; | ||
1207 | p_s_tb->insert_size[0] = n_size; | ||
1208 | } | ||
1174 | 1209 | ||
1175 | void padd_item (char * item, int total_length, int length) | 1210 | void padd_item(char *item, int total_length, int length) |
1176 | { | 1211 | { |
1177 | int i; | 1212 | int i; |
1178 | 1213 | ||
1179 | for (i = total_length; i > length; ) | 1214 | for (i = total_length; i > length;) |
1180 | item [--i] = 0; | 1215 | item[--i] = 0; |
1181 | } | 1216 | } |
1182 | 1217 | ||
1183 | #ifdef REISERQUOTA_DEBUG | 1218 | #ifdef REISERQUOTA_DEBUG |
1184 | char key2type(struct reiserfs_key *ih) | 1219 | char key2type(struct reiserfs_key *ih) |
1185 | { | 1220 | { |
1186 | if (is_direntry_le_key(2, ih)) | 1221 | if (is_direntry_le_key(2, ih)) |
1187 | return 'd'; | 1222 | return 'd'; |
1188 | if (is_direct_le_key(2, ih)) | 1223 | if (is_direct_le_key(2, ih)) |
1189 | return 'D'; | 1224 | return 'D'; |
1190 | if (is_indirect_le_key(2, ih)) | 1225 | if (is_indirect_le_key(2, ih)) |
1191 | return 'i'; | 1226 | return 'i'; |
1192 | if (is_statdata_le_key(2, ih)) | 1227 | if (is_statdata_le_key(2, ih)) |
1193 | return 's'; | 1228 | return 's'; |
1194 | return 'u'; | 1229 | return 'u'; |
1195 | } | 1230 | } |
1196 | 1231 | ||
1197 | char head2type(struct item_head *ih) | 1232 | char head2type(struct item_head *ih) |
1198 | { | 1233 | { |
1199 | if (is_direntry_le_ih(ih)) | 1234 | if (is_direntry_le_ih(ih)) |
1200 | return 'd'; | 1235 | return 'd'; |
1201 | if (is_direct_le_ih(ih)) | 1236 | if (is_direct_le_ih(ih)) |
1202 | return 'D'; | 1237 | return 'D'; |
1203 | if (is_indirect_le_ih(ih)) | 1238 | if (is_indirect_le_ih(ih)) |
1204 | return 'i'; | 1239 | return 'i'; |
1205 | if (is_statdata_le_ih(ih)) | 1240 | if (is_statdata_le_ih(ih)) |
1206 | return 's'; | 1241 | return 's'; |
1207 | return 'u'; | 1242 | return 'u'; |
1208 | } | 1243 | } |
1209 | #endif | 1244 | #endif |
1210 | 1245 | ||
1211 | /* Delete object item. */ | 1246 | /* Delete object item. */ |
1212 | int reiserfs_delete_item (struct reiserfs_transaction_handle *th, | 1247 | int reiserfs_delete_item(struct reiserfs_transaction_handle *th, struct path *p_s_path, /* Path to the deleted item. */ |
1213 | struct path * p_s_path, /* Path to the deleted item. */ | 1248 | const struct cpu_key *p_s_item_key, /* Key to search for the deleted item. */ |
1214 | const struct cpu_key * p_s_item_key, /* Key to search for the deleted item. */ | 1249 | struct inode *p_s_inode, /* inode is here just to update i_blocks and quotas */ |
1215 | struct inode * p_s_inode,/* inode is here just to update i_blocks and quotas */ | 1250 | struct buffer_head *p_s_un_bh) |
1216 | struct buffer_head * p_s_un_bh) /* NULL or unformatted node pointer. */ | 1251 | { /* NULL or unformatted node pointer. */ |
1217 | { | 1252 | struct super_block *p_s_sb = p_s_inode->i_sb; |
1218 | struct super_block * p_s_sb = p_s_inode->i_sb; | 1253 | struct tree_balance s_del_balance; |
1219 | struct tree_balance s_del_balance; | 1254 | struct item_head s_ih; |
1220 | struct item_head s_ih; | 1255 | struct item_head *q_ih; |
1221 | struct item_head *q_ih; | 1256 | int quota_cut_bytes; |
1222 | int quota_cut_bytes; | 1257 | int n_ret_value, n_del_size, n_removed; |
1223 | int n_ret_value, | ||
1224 | n_del_size, | ||
1225 | n_removed; | ||
1226 | 1258 | ||
1227 | #ifdef CONFIG_REISERFS_CHECK | 1259 | #ifdef CONFIG_REISERFS_CHECK |
1228 | char c_mode; | 1260 | char c_mode; |
1229 | int n_iter = 0; | 1261 | int n_iter = 0; |
1230 | #endif | 1262 | #endif |
1231 | 1263 | ||
1232 | BUG_ON (!th->t_trans_id); | 1264 | BUG_ON(!th->t_trans_id); |
1233 | 1265 | ||
1234 | init_tb_struct(th, &s_del_balance, p_s_sb, p_s_path, 0/*size is unknown*/); | 1266 | init_tb_struct(th, &s_del_balance, p_s_sb, p_s_path, |
1267 | 0 /*size is unknown */ ); | ||
1235 | 1268 | ||
1236 | while ( 1 ) { | 1269 | while (1) { |
1237 | n_removed = 0; | 1270 | n_removed = 0; |
1238 | 1271 | ||
1239 | #ifdef CONFIG_REISERFS_CHECK | 1272 | #ifdef CONFIG_REISERFS_CHECK |
1240 | n_iter++; | 1273 | n_iter++; |
1241 | c_mode = | 1274 | c_mode = |
1242 | #endif | 1275 | #endif |
1243 | prepare_for_delete_or_cut(th, p_s_inode, p_s_path, p_s_item_key, &n_removed, &n_del_size, max_reiserfs_offset (p_s_inode)); | 1276 | prepare_for_delete_or_cut(th, p_s_inode, p_s_path, |
1244 | 1277 | p_s_item_key, &n_removed, | |
1245 | RFALSE( c_mode != M_DELETE, "PAP-5320: mode must be M_DELETE"); | 1278 | &n_del_size, |
1246 | 1279 | max_reiserfs_offset(p_s_inode)); | |
1247 | copy_item_head(&s_ih, PATH_PITEM_HEAD(p_s_path)); | 1280 | |
1248 | s_del_balance.insert_size[0] = n_del_size; | 1281 | RFALSE(c_mode != M_DELETE, "PAP-5320: mode must be M_DELETE"); |
1249 | 1282 | ||
1250 | n_ret_value = fix_nodes(M_DELETE, &s_del_balance, NULL, NULL); | 1283 | copy_item_head(&s_ih, PATH_PITEM_HEAD(p_s_path)); |
1251 | if ( n_ret_value != REPEAT_SEARCH ) | 1284 | s_del_balance.insert_size[0] = n_del_size; |
1252 | break; | 1285 | |
1253 | 1286 | n_ret_value = fix_nodes(M_DELETE, &s_del_balance, NULL, NULL); | |
1254 | PROC_INFO_INC( p_s_sb, delete_item_restarted ); | 1287 | if (n_ret_value != REPEAT_SEARCH) |
1288 | break; | ||
1289 | |||
1290 | PROC_INFO_INC(p_s_sb, delete_item_restarted); | ||
1291 | |||
1292 | // file system changed, repeat search | ||
1293 | n_ret_value = | ||
1294 | search_for_position_by_key(p_s_sb, p_s_item_key, p_s_path); | ||
1295 | if (n_ret_value == IO_ERROR) | ||
1296 | break; | ||
1297 | if (n_ret_value == FILE_NOT_FOUND) { | ||
1298 | reiserfs_warning(p_s_sb, | ||
1299 | "vs-5340: reiserfs_delete_item: " | ||
1300 | "no items of the file %K found", | ||
1301 | p_s_item_key); | ||
1302 | break; | ||
1303 | } | ||
1304 | } /* while (1) */ | ||
1255 | 1305 | ||
1256 | // file system changed, repeat search | 1306 | if (n_ret_value != CARRY_ON) { |
1257 | n_ret_value = search_for_position_by_key(p_s_sb, p_s_item_key, p_s_path); | 1307 | unfix_nodes(&s_del_balance); |
1258 | if (n_ret_value == IO_ERROR) | 1308 | return 0; |
1259 | break; | 1309 | } |
1260 | if (n_ret_value == FILE_NOT_FOUND) { | 1310 | // reiserfs_delete_item returns item length when success |
1261 | reiserfs_warning (p_s_sb, "vs-5340: reiserfs_delete_item: " | 1311 | n_ret_value = calc_deleted_bytes_number(&s_del_balance, M_DELETE); |
1262 | "no items of the file %K found", p_s_item_key); | 1312 | q_ih = get_ih(p_s_path); |
1263 | break; | 1313 | quota_cut_bytes = ih_item_len(q_ih); |
1314 | |||
1315 | /* hack so the quota code doesn't have to guess if the file | ||
1316 | ** has a tail. On tail insert, we allocate quota for 1 unformatted node. | ||
1317 | ** We test the offset because the tail might have been | ||
1318 | ** split into multiple items, and we only want to decrement for | ||
1319 | ** the unfm node once | ||
1320 | */ | ||
1321 | if (!S_ISLNK(p_s_inode->i_mode) && is_direct_le_ih(q_ih)) { | ||
1322 | if ((le_ih_k_offset(q_ih) & (p_s_sb->s_blocksize - 1)) == 1) { | ||
1323 | quota_cut_bytes = p_s_sb->s_blocksize + UNFM_P_SIZE; | ||
1324 | } else { | ||
1325 | quota_cut_bytes = 0; | ||
1326 | } | ||
1264 | } | 1327 | } |
1265 | } /* while (1) */ | ||
1266 | 1328 | ||
1267 | if ( n_ret_value != CARRY_ON ) { | 1329 | if (p_s_un_bh) { |
1268 | unfix_nodes(&s_del_balance); | 1330 | int off; |
1269 | return 0; | 1331 | char *data; |
1270 | } | 1332 | |
1271 | 1333 | /* We are in direct2indirect conversion, so move tail contents | |
1272 | // reiserfs_delete_item returns item length when success | 1334 | to the unformatted node */ |
1273 | n_ret_value = calc_deleted_bytes_number(&s_del_balance, M_DELETE); | 1335 | /* note, we do the copy before preparing the buffer because we |
1274 | q_ih = get_ih(p_s_path) ; | 1336 | ** don't care about the contents of the unformatted node yet. |
1275 | quota_cut_bytes = ih_item_len(q_ih) ; | 1337 | ** the only thing we really care about is the direct item's data |
1276 | 1338 | ** is in the unformatted node. | |
1277 | /* hack so the quota code doesn't have to guess if the file | 1339 | ** |
1278 | ** has a tail. On tail insert, we allocate quota for 1 unformatted node. | 1340 | ** Otherwise, we would have to call reiserfs_prepare_for_journal on |
1279 | ** We test the offset because the tail might have been | 1341 | ** the unformatted node, which might schedule, meaning we'd have to |
1280 | ** split into multiple items, and we only want to decrement for | 1342 | ** loop all the way back up to the start of the while loop. |
1281 | ** the unfm node once | 1343 | ** |
1282 | */ | 1344 | ** The unformatted node must be dirtied later on. We can't be |
1283 | if (!S_ISLNK (p_s_inode->i_mode) && is_direct_le_ih(q_ih)) { | 1345 | ** sure here if the entire tail has been deleted yet. |
1284 | if ((le_ih_k_offset(q_ih) & (p_s_sb->s_blocksize - 1)) == 1) { | 1346 | ** |
1285 | quota_cut_bytes = p_s_sb->s_blocksize + UNFM_P_SIZE; | 1347 | ** p_s_un_bh is from the page cache (all unformatted nodes are |
1286 | } else { | 1348 | ** from the page cache) and might be a highmem page. So, we |
1287 | quota_cut_bytes = 0 ; | 1349 | ** can't use p_s_un_bh->b_data. |
1350 | ** -clm | ||
1351 | */ | ||
1352 | |||
1353 | data = kmap_atomic(p_s_un_bh->b_page, KM_USER0); | ||
1354 | off = ((le_ih_k_offset(&s_ih) - 1) & (PAGE_CACHE_SIZE - 1)); | ||
1355 | memcpy(data + off, | ||
1356 | B_I_PITEM(PATH_PLAST_BUFFER(p_s_path), &s_ih), | ||
1357 | n_ret_value); | ||
1358 | kunmap_atomic(data, KM_USER0); | ||
1288 | } | 1359 | } |
1289 | } | 1360 | /* Perform balancing after all resources have been collected at once. */ |
1290 | 1361 | do_balance(&s_del_balance, NULL, NULL, M_DELETE); | |
1291 | if ( p_s_un_bh ) { | ||
1292 | int off; | ||
1293 | char *data ; | ||
1294 | |||
1295 | /* We are in direct2indirect conversion, so move tail contents | ||
1296 | to the unformatted node */ | ||
1297 | /* note, we do the copy before preparing the buffer because we | ||
1298 | ** don't care about the contents of the unformatted node yet. | ||
1299 | ** the only thing we really care about is the direct item's data | ||
1300 | ** is in the unformatted node. | ||
1301 | ** | ||
1302 | ** Otherwise, we would have to call reiserfs_prepare_for_journal on | ||
1303 | ** the unformatted node, which might schedule, meaning we'd have to | ||
1304 | ** loop all the way back up to the start of the while loop. | ||
1305 | ** | ||
1306 | ** The unformatted node must be dirtied later on. We can't be | ||
1307 | ** sure here if the entire tail has been deleted yet. | ||
1308 | ** | ||
1309 | ** p_s_un_bh is from the page cache (all unformatted nodes are | ||
1310 | ** from the page cache) and might be a highmem page. So, we | ||
1311 | ** can't use p_s_un_bh->b_data. | ||
1312 | ** -clm | ||
1313 | */ | ||
1314 | |||
1315 | data = kmap_atomic(p_s_un_bh->b_page, KM_USER0); | ||
1316 | off = ((le_ih_k_offset (&s_ih) - 1) & (PAGE_CACHE_SIZE - 1)); | ||
1317 | memcpy(data + off, | ||
1318 | B_I_PITEM(PATH_PLAST_BUFFER(p_s_path), &s_ih), n_ret_value); | ||
1319 | kunmap_atomic(data, KM_USER0); | ||
1320 | } | ||
1321 | /* Perform balancing after all resources have been collected at once. */ | ||
1322 | do_balance(&s_del_balance, NULL, NULL, M_DELETE); | ||
1323 | 1362 | ||
1324 | #ifdef REISERQUOTA_DEBUG | 1363 | #ifdef REISERQUOTA_DEBUG |
1325 | reiserfs_debug (p_s_sb, REISERFS_DEBUG_CODE, "reiserquota delete_item(): freeing %u, id=%u type=%c", quota_cut_bytes, p_s_inode->i_uid, head2type(&s_ih)); | 1364 | reiserfs_debug(p_s_sb, REISERFS_DEBUG_CODE, |
1365 | "reiserquota delete_item(): freeing %u, id=%u type=%c", | ||
1366 | quota_cut_bytes, p_s_inode->i_uid, head2type(&s_ih)); | ||
1326 | #endif | 1367 | #endif |
1327 | DQUOT_FREE_SPACE_NODIRTY(p_s_inode, quota_cut_bytes); | 1368 | DQUOT_FREE_SPACE_NODIRTY(p_s_inode, quota_cut_bytes); |
1328 | 1369 | ||
1329 | /* Return deleted body length */ | 1370 | /* Return deleted body length */ |
1330 | return n_ret_value; | 1371 | return n_ret_value; |
1331 | } | 1372 | } |
1332 | 1373 | ||
1333 | |||
1334 | /* Summary Of Mechanisms For Handling Collisions Between Processes: | 1374 | /* Summary Of Mechanisms For Handling Collisions Between Processes: |
1335 | 1375 | ||
1336 | deletion of the body of the object is performed by iput(), with the | 1376 | deletion of the body of the object is performed by iput(), with the |
@@ -1347,727 +1387,804 @@ int reiserfs_delete_item (struct reiserfs_transaction_handle *th, | |||
1347 | - Hans | 1387 | - Hans |
1348 | */ | 1388 | */ |
1349 | 1389 | ||
1350 | |||
1351 | /* this deletes item which never gets split */ | 1390 | /* this deletes item which never gets split */ |
1352 | void reiserfs_delete_solid_item (struct reiserfs_transaction_handle *th, | 1391 | void reiserfs_delete_solid_item(struct reiserfs_transaction_handle *th, |
1353 | struct inode *inode, | 1392 | struct inode *inode, struct reiserfs_key *key) |
1354 | struct reiserfs_key * key) | ||
1355 | { | 1393 | { |
1356 | struct tree_balance tb; | 1394 | struct tree_balance tb; |
1357 | INITIALIZE_PATH (path); | 1395 | INITIALIZE_PATH(path); |
1358 | int item_len = 0; | 1396 | int item_len = 0; |
1359 | int tb_init = 0 ; | 1397 | int tb_init = 0; |
1360 | struct cpu_key cpu_key; | 1398 | struct cpu_key cpu_key; |
1361 | int retval; | 1399 | int retval; |
1362 | int quota_cut_bytes = 0; | 1400 | int quota_cut_bytes = 0; |
1363 | 1401 | ||
1364 | BUG_ON (!th->t_trans_id); | 1402 | BUG_ON(!th->t_trans_id); |
1365 | 1403 | ||
1366 | le_key2cpu_key (&cpu_key, key); | 1404 | le_key2cpu_key(&cpu_key, key); |
1367 | 1405 | ||
1368 | while (1) { | 1406 | while (1) { |
1369 | retval = search_item (th->t_super, &cpu_key, &path); | 1407 | retval = search_item(th->t_super, &cpu_key, &path); |
1370 | if (retval == IO_ERROR) { | 1408 | if (retval == IO_ERROR) { |
1371 | reiserfs_warning (th->t_super, | 1409 | reiserfs_warning(th->t_super, |
1372 | "vs-5350: reiserfs_delete_solid_item: " | 1410 | "vs-5350: reiserfs_delete_solid_item: " |
1373 | "i/o failure occurred trying to delete %K", | 1411 | "i/o failure occurred trying to delete %K", |
1374 | &cpu_key); | 1412 | &cpu_key); |
1375 | break; | 1413 | break; |
1376 | } | 1414 | } |
1377 | if (retval != ITEM_FOUND) { | 1415 | if (retval != ITEM_FOUND) { |
1378 | pathrelse (&path); | 1416 | pathrelse(&path); |
1379 | // No need for a warning, if there is just no free space to insert '..' item into the newly-created subdir | 1417 | // No need for a warning, if there is just no free space to insert '..' item into the newly-created subdir |
1380 | if ( !( (unsigned long long) GET_HASH_VALUE (le_key_k_offset (le_key_version (key), key)) == 0 && \ | 1418 | if (! |
1381 | (unsigned long long) GET_GENERATION_NUMBER (le_key_k_offset (le_key_version (key), key)) == 1 ) ) | 1419 | ((unsigned long long) |
1382 | reiserfs_warning (th->t_super, "vs-5355: reiserfs_delete_solid_item: %k not found", key); | 1420 | GET_HASH_VALUE(le_key_k_offset |
1383 | break; | 1421 | (le_key_version(key), key)) == 0 |
1384 | } | 1422 | && (unsigned long long) |
1385 | if (!tb_init) { | 1423 | GET_GENERATION_NUMBER(le_key_k_offset |
1386 | tb_init = 1 ; | 1424 | (le_key_version(key), |
1387 | item_len = ih_item_len( PATH_PITEM_HEAD(&path) ); | 1425 | key)) == 1)) |
1388 | init_tb_struct (th, &tb, th->t_super, &path, - (IH_SIZE + item_len)); | 1426 | reiserfs_warning(th->t_super, |
1389 | } | 1427 | "vs-5355: reiserfs_delete_solid_item: %k not found", |
1390 | quota_cut_bytes = ih_item_len(PATH_PITEM_HEAD(&path)) ; | 1428 | key); |
1429 | break; | ||
1430 | } | ||
1431 | if (!tb_init) { | ||
1432 | tb_init = 1; | ||
1433 | item_len = ih_item_len(PATH_PITEM_HEAD(&path)); | ||
1434 | init_tb_struct(th, &tb, th->t_super, &path, | ||
1435 | -(IH_SIZE + item_len)); | ||
1436 | } | ||
1437 | quota_cut_bytes = ih_item_len(PATH_PITEM_HEAD(&path)); | ||
1391 | 1438 | ||
1392 | retval = fix_nodes (M_DELETE, &tb, NULL, NULL); | 1439 | retval = fix_nodes(M_DELETE, &tb, NULL, NULL); |
1393 | if (retval == REPEAT_SEARCH) { | 1440 | if (retval == REPEAT_SEARCH) { |
1394 | PROC_INFO_INC( th -> t_super, delete_solid_item_restarted ); | 1441 | PROC_INFO_INC(th->t_super, delete_solid_item_restarted); |
1395 | continue; | 1442 | continue; |
1396 | } | 1443 | } |
1397 | 1444 | ||
1398 | if (retval == CARRY_ON) { | 1445 | if (retval == CARRY_ON) { |
1399 | do_balance (&tb, NULL, NULL, M_DELETE); | 1446 | do_balance(&tb, NULL, NULL, M_DELETE); |
1400 | if (inode) { /* Should we count quota for item? (we don't count quotas for save-links) */ | 1447 | if (inode) { /* Should we count quota for item? (we don't count quotas for save-links) */ |
1401 | #ifdef REISERQUOTA_DEBUG | 1448 | #ifdef REISERQUOTA_DEBUG |
1402 | reiserfs_debug (th->t_super, REISERFS_DEBUG_CODE, "reiserquota delete_solid_item(): freeing %u id=%u type=%c", quota_cut_bytes, inode->i_uid, key2type(key)); | 1449 | reiserfs_debug(th->t_super, REISERFS_DEBUG_CODE, |
1450 | "reiserquota delete_solid_item(): freeing %u id=%u type=%c", | ||
1451 | quota_cut_bytes, inode->i_uid, | ||
1452 | key2type(key)); | ||
1403 | #endif | 1453 | #endif |
1404 | DQUOT_FREE_SPACE_NODIRTY(inode, quota_cut_bytes); | 1454 | DQUOT_FREE_SPACE_NODIRTY(inode, |
1405 | } | 1455 | quota_cut_bytes); |
1406 | break; | 1456 | } |
1457 | break; | ||
1458 | } | ||
1459 | // IO_ERROR, NO_DISK_SPACE, etc | ||
1460 | reiserfs_warning(th->t_super, | ||
1461 | "vs-5360: reiserfs_delete_solid_item: " | ||
1462 | "could not delete %K due to fix_nodes failure", | ||
1463 | &cpu_key); | ||
1464 | unfix_nodes(&tb); | ||
1465 | break; | ||
1407 | } | 1466 | } |
1408 | 1467 | ||
1409 | // IO_ERROR, NO_DISK_SPACE, etc | 1468 | reiserfs_check_path(&path); |
1410 | reiserfs_warning (th->t_super, "vs-5360: reiserfs_delete_solid_item: " | ||
1411 | "could not delete %K due to fix_nodes failure", &cpu_key); | ||
1412 | unfix_nodes (&tb); | ||
1413 | break; | ||
1414 | } | ||
1415 | |||
1416 | reiserfs_check_path(&path) ; | ||
1417 | } | 1469 | } |
1418 | 1470 | ||
1419 | 1471 | int reiserfs_delete_object(struct reiserfs_transaction_handle *th, | |
1420 | int reiserfs_delete_object (struct reiserfs_transaction_handle *th, struct inode * inode) | 1472 | struct inode *inode) |
1421 | { | 1473 | { |
1422 | int err; | 1474 | int err; |
1423 | inode->i_size = 0; | 1475 | inode->i_size = 0; |
1424 | BUG_ON (!th->t_trans_id); | 1476 | BUG_ON(!th->t_trans_id); |
1425 | 1477 | ||
1426 | /* for directory this deletes item containing "." and ".." */ | 1478 | /* for directory this deletes item containing "." and ".." */ |
1427 | err = reiserfs_do_truncate (th, inode, NULL, 0/*no timestamp updates*/); | 1479 | err = |
1428 | if (err) | 1480 | reiserfs_do_truncate(th, inode, NULL, 0 /*no timestamp updates */ ); |
1429 | return err; | 1481 | if (err) |
1430 | 1482 | return err; | |
1483 | |||
1431 | #if defined( USE_INODE_GENERATION_COUNTER ) | 1484 | #if defined( USE_INODE_GENERATION_COUNTER ) |
1432 | if( !old_format_only ( th -> t_super ) ) | 1485 | if (!old_format_only(th->t_super)) { |
1433 | { | 1486 | __le32 *inode_generation; |
1434 | __le32 *inode_generation; | 1487 | |
1435 | 1488 | inode_generation = | |
1436 | inode_generation = | 1489 | &REISERFS_SB(th->t_super)->s_rs->s_inode_generation; |
1437 | &REISERFS_SB(th -> t_super) -> s_rs -> s_inode_generation; | 1490 | *inode_generation = |
1438 | *inode_generation = cpu_to_le32( le32_to_cpu( *inode_generation ) + 1 ); | 1491 | cpu_to_le32(le32_to_cpu(*inode_generation) + 1); |
1439 | } | 1492 | } |
1440 | /* USE_INODE_GENERATION_COUNTER */ | 1493 | /* USE_INODE_GENERATION_COUNTER */ |
1441 | #endif | 1494 | #endif |
1442 | reiserfs_delete_solid_item (th, inode, INODE_PKEY (inode)); | 1495 | reiserfs_delete_solid_item(th, inode, INODE_PKEY(inode)); |
1443 | 1496 | ||
1444 | return err; | 1497 | return err; |
1445 | } | 1498 | } |
1446 | 1499 | ||
1447 | static void | 1500 | static void unmap_buffers(struct page *page, loff_t pos) |
1448 | unmap_buffers(struct page *page, loff_t pos) { | 1501 | { |
1449 | struct buffer_head *bh ; | 1502 | struct buffer_head *bh; |
1450 | struct buffer_head *head ; | 1503 | struct buffer_head *head; |
1451 | struct buffer_head *next ; | 1504 | struct buffer_head *next; |
1452 | unsigned long tail_index ; | 1505 | unsigned long tail_index; |
1453 | unsigned long cur_index ; | 1506 | unsigned long cur_index; |
1454 | 1507 | ||
1455 | if (page) { | 1508 | if (page) { |
1456 | if (page_has_buffers(page)) { | 1509 | if (page_has_buffers(page)) { |
1457 | tail_index = pos & (PAGE_CACHE_SIZE - 1) ; | 1510 | tail_index = pos & (PAGE_CACHE_SIZE - 1); |
1458 | cur_index = 0 ; | 1511 | cur_index = 0; |
1459 | head = page_buffers(page) ; | 1512 | head = page_buffers(page); |
1460 | bh = head ; | 1513 | bh = head; |
1461 | do { | 1514 | do { |
1462 | next = bh->b_this_page ; | 1515 | next = bh->b_this_page; |
1463 | 1516 | ||
1464 | /* we want to unmap the buffers that contain the tail, and | 1517 | /* we want to unmap the buffers that contain the tail, and |
1465 | ** all the buffers after it (since the tail must be at the | 1518 | ** all the buffers after it (since the tail must be at the |
1466 | ** end of the file). We don't want to unmap file data | 1519 | ** end of the file). We don't want to unmap file data |
1467 | ** before the tail, since it might be dirty and waiting to | 1520 | ** before the tail, since it might be dirty and waiting to |
1468 | ** reach disk | 1521 | ** reach disk |
1469 | */ | 1522 | */ |
1470 | cur_index += bh->b_size ; | 1523 | cur_index += bh->b_size; |
1471 | if (cur_index > tail_index) { | 1524 | if (cur_index > tail_index) { |
1472 | reiserfs_unmap_buffer(bh) ; | 1525 | reiserfs_unmap_buffer(bh); |
1526 | } | ||
1527 | bh = next; | ||
1528 | } while (bh != head); | ||
1529 | if (PAGE_SIZE == bh->b_size) { | ||
1530 | clear_page_dirty(page); | ||
1531 | } | ||
1473 | } | 1532 | } |
1474 | bh = next ; | ||
1475 | } while (bh != head) ; | ||
1476 | if ( PAGE_SIZE == bh->b_size ) { | ||
1477 | clear_page_dirty(page); | ||
1478 | } | ||
1479 | } | 1533 | } |
1480 | } | ||
1481 | } | 1534 | } |
1482 | 1535 | ||
1483 | static int maybe_indirect_to_direct (struct reiserfs_transaction_handle *th, | 1536 | static int maybe_indirect_to_direct(struct reiserfs_transaction_handle *th, |
1484 | struct inode * p_s_inode, | 1537 | struct inode *p_s_inode, |
1485 | struct page *page, | 1538 | struct page *page, |
1486 | struct path * p_s_path, | 1539 | struct path *p_s_path, |
1487 | const struct cpu_key * p_s_item_key, | 1540 | const struct cpu_key *p_s_item_key, |
1488 | loff_t n_new_file_size, | 1541 | loff_t n_new_file_size, char *p_c_mode) |
1489 | char * p_c_mode | 1542 | { |
1490 | ) { | 1543 | struct super_block *p_s_sb = p_s_inode->i_sb; |
1491 | struct super_block * p_s_sb = p_s_inode->i_sb; | 1544 | int n_block_size = p_s_sb->s_blocksize; |
1492 | int n_block_size = p_s_sb->s_blocksize; | 1545 | int cut_bytes; |
1493 | int cut_bytes; | 1546 | BUG_ON(!th->t_trans_id); |
1494 | BUG_ON (!th->t_trans_id); | 1547 | |
1495 | 1548 | if (n_new_file_size != p_s_inode->i_size) | |
1496 | if (n_new_file_size != p_s_inode->i_size) | 1549 | BUG(); |
1497 | BUG (); | ||
1498 | |||
1499 | /* the page being sent in could be NULL if there was an i/o error | ||
1500 | ** reading in the last block. The user will hit problems trying to | ||
1501 | ** read the file, but for now we just skip the indirect2direct | ||
1502 | */ | ||
1503 | if (atomic_read(&p_s_inode->i_count) > 1 || | ||
1504 | !tail_has_to_be_packed (p_s_inode) || | ||
1505 | !page || (REISERFS_I(p_s_inode)->i_flags & i_nopack_mask)) { | ||
1506 | // leave tail in an unformatted node | ||
1507 | *p_c_mode = M_SKIP_BALANCING; | ||
1508 | cut_bytes = n_block_size - (n_new_file_size & (n_block_size - 1)); | ||
1509 | pathrelse(p_s_path); | ||
1510 | return cut_bytes; | ||
1511 | } | ||
1512 | /* Permorm the conversion to a direct_item. */ | ||
1513 | /*return indirect_to_direct (p_s_inode, p_s_path, p_s_item_key, n_new_file_size, p_c_mode);*/ | ||
1514 | return indirect2direct (th, p_s_inode, page, p_s_path, p_s_item_key, n_new_file_size, p_c_mode); | ||
1515 | } | ||
1516 | 1550 | ||
1551 | /* the page being sent in could be NULL if there was an i/o error | ||
1552 | ** reading in the last block. The user will hit problems trying to | ||
1553 | ** read the file, but for now we just skip the indirect2direct | ||
1554 | */ | ||
1555 | if (atomic_read(&p_s_inode->i_count) > 1 || | ||
1556 | !tail_has_to_be_packed(p_s_inode) || | ||
1557 | !page || (REISERFS_I(p_s_inode)->i_flags & i_nopack_mask)) { | ||
1558 | // leave tail in an unformatted node | ||
1559 | *p_c_mode = M_SKIP_BALANCING; | ||
1560 | cut_bytes = | ||
1561 | n_block_size - (n_new_file_size & (n_block_size - 1)); | ||
1562 | pathrelse(p_s_path); | ||
1563 | return cut_bytes; | ||
1564 | } | ||
1565 | /* Permorm the conversion to a direct_item. */ | ||
1566 | /*return indirect_to_direct (p_s_inode, p_s_path, p_s_item_key, n_new_file_size, p_c_mode); */ | ||
1567 | return indirect2direct(th, p_s_inode, page, p_s_path, p_s_item_key, | ||
1568 | n_new_file_size, p_c_mode); | ||
1569 | } | ||
1517 | 1570 | ||
1518 | /* we did indirect_to_direct conversion. And we have inserted direct | 1571 | /* we did indirect_to_direct conversion. And we have inserted direct |
1519 | item successesfully, but there were no disk space to cut unfm | 1572 | item successesfully, but there were no disk space to cut unfm |
1520 | pointer being converted. Therefore we have to delete inserted | 1573 | pointer being converted. Therefore we have to delete inserted |
1521 | direct item(s) */ | 1574 | direct item(s) */ |
1522 | static void indirect_to_direct_roll_back (struct reiserfs_transaction_handle *th, struct inode * inode, struct path * path) | 1575 | static void indirect_to_direct_roll_back(struct reiserfs_transaction_handle *th, |
1576 | struct inode *inode, struct path *path) | ||
1523 | { | 1577 | { |
1524 | struct cpu_key tail_key; | 1578 | struct cpu_key tail_key; |
1525 | int tail_len; | 1579 | int tail_len; |
1526 | int removed; | 1580 | int removed; |
1527 | BUG_ON (!th->t_trans_id); | 1581 | BUG_ON(!th->t_trans_id); |
1528 | 1582 | ||
1529 | make_cpu_key (&tail_key, inode, inode->i_size + 1, TYPE_DIRECT, 4);// !!!! | 1583 | make_cpu_key(&tail_key, inode, inode->i_size + 1, TYPE_DIRECT, 4); // !!!! |
1530 | tail_key.key_length = 4; | 1584 | tail_key.key_length = 4; |
1531 | 1585 | ||
1532 | tail_len = (cpu_key_k_offset (&tail_key) & (inode->i_sb->s_blocksize - 1)) - 1; | 1586 | tail_len = |
1533 | while (tail_len) { | 1587 | (cpu_key_k_offset(&tail_key) & (inode->i_sb->s_blocksize - 1)) - 1; |
1534 | /* look for the last byte of the tail */ | 1588 | while (tail_len) { |
1535 | if (search_for_position_by_key (inode->i_sb, &tail_key, path) == POSITION_NOT_FOUND) | 1589 | /* look for the last byte of the tail */ |
1536 | reiserfs_panic (inode->i_sb, "vs-5615: indirect_to_direct_roll_back: found invalid item"); | 1590 | if (search_for_position_by_key(inode->i_sb, &tail_key, path) == |
1537 | RFALSE( path->pos_in_item != ih_item_len(PATH_PITEM_HEAD (path)) - 1, | 1591 | POSITION_NOT_FOUND) |
1538 | "vs-5616: appended bytes found"); | 1592 | reiserfs_panic(inode->i_sb, |
1539 | PATH_LAST_POSITION (path) --; | 1593 | "vs-5615: indirect_to_direct_roll_back: found invalid item"); |
1540 | 1594 | RFALSE(path->pos_in_item != | |
1541 | removed = reiserfs_delete_item (th, path, &tail_key, inode, NULL/*unbh not needed*/); | 1595 | ih_item_len(PATH_PITEM_HEAD(path)) - 1, |
1542 | RFALSE( removed <= 0 || removed > tail_len, | 1596 | "vs-5616: appended bytes found"); |
1543 | "vs-5617: there was tail %d bytes, removed item length %d bytes", | 1597 | PATH_LAST_POSITION(path)--; |
1544 | tail_len, removed); | 1598 | |
1545 | tail_len -= removed; | 1599 | removed = |
1546 | set_cpu_key_k_offset (&tail_key, cpu_key_k_offset (&tail_key) - removed); | 1600 | reiserfs_delete_item(th, path, &tail_key, inode, |
1547 | } | 1601 | NULL /*unbh not needed */ ); |
1548 | reiserfs_warning (inode->i_sb, "indirect_to_direct_roll_back: indirect_to_direct conversion has been rolled back due to lack of disk space"); | 1602 | RFALSE(removed <= 0 |
1549 | //mark_file_without_tail (inode); | 1603 | || removed > tail_len, |
1550 | mark_inode_dirty (inode); | 1604 | "vs-5617: there was tail %d bytes, removed item length %d bytes", |
1605 | tail_len, removed); | ||
1606 | tail_len -= removed; | ||
1607 | set_cpu_key_k_offset(&tail_key, | ||
1608 | cpu_key_k_offset(&tail_key) - removed); | ||
1609 | } | ||
1610 | reiserfs_warning(inode->i_sb, | ||
1611 | "indirect_to_direct_roll_back: indirect_to_direct conversion has been rolled back due to lack of disk space"); | ||
1612 | //mark_file_without_tail (inode); | ||
1613 | mark_inode_dirty(inode); | ||
1551 | } | 1614 | } |
1552 | 1615 | ||
1553 | |||
1554 | /* (Truncate or cut entry) or delete object item. Returns < 0 on failure */ | 1616 | /* (Truncate or cut entry) or delete object item. Returns < 0 on failure */ |
1555 | int reiserfs_cut_from_item (struct reiserfs_transaction_handle *th, | 1617 | int reiserfs_cut_from_item(struct reiserfs_transaction_handle *th, |
1556 | struct path * p_s_path, | 1618 | struct path *p_s_path, |
1557 | struct cpu_key * p_s_item_key, | 1619 | struct cpu_key *p_s_item_key, |
1558 | struct inode * p_s_inode, | 1620 | struct inode *p_s_inode, |
1559 | struct page *page, | 1621 | struct page *page, loff_t n_new_file_size) |
1560 | loff_t n_new_file_size) | ||
1561 | { | 1622 | { |
1562 | struct super_block * p_s_sb = p_s_inode->i_sb; | 1623 | struct super_block *p_s_sb = p_s_inode->i_sb; |
1563 | /* Every function which is going to call do_balance must first | 1624 | /* Every function which is going to call do_balance must first |
1564 | create a tree_balance structure. Then it must fill up this | 1625 | create a tree_balance structure. Then it must fill up this |
1565 | structure by using the init_tb_struct and fix_nodes functions. | 1626 | structure by using the init_tb_struct and fix_nodes functions. |
1566 | After that we can make tree balancing. */ | 1627 | After that we can make tree balancing. */ |
1567 | struct tree_balance s_cut_balance; | 1628 | struct tree_balance s_cut_balance; |
1568 | struct item_head *p_le_ih; | 1629 | struct item_head *p_le_ih; |
1569 | int n_cut_size = 0, /* Amount to be cut. */ | 1630 | int n_cut_size = 0, /* Amount to be cut. */ |
1570 | n_ret_value = CARRY_ON, | 1631 | n_ret_value = CARRY_ON, n_removed = 0, /* Number of the removed unformatted nodes. */ |
1571 | n_removed = 0, /* Number of the removed unformatted nodes. */ | 1632 | n_is_inode_locked = 0; |
1572 | n_is_inode_locked = 0; | 1633 | char c_mode; /* Mode of the balance. */ |
1573 | char c_mode; /* Mode of the balance. */ | 1634 | int retval2 = -1; |
1574 | int retval2 = -1; | 1635 | int quota_cut_bytes; |
1575 | int quota_cut_bytes; | 1636 | loff_t tail_pos = 0; |
1576 | loff_t tail_pos = 0; | 1637 | |
1577 | 1638 | BUG_ON(!th->t_trans_id); | |
1578 | BUG_ON (!th->t_trans_id); | 1639 | |
1579 | 1640 | init_tb_struct(th, &s_cut_balance, p_s_inode->i_sb, p_s_path, | |
1580 | init_tb_struct(th, &s_cut_balance, p_s_inode->i_sb, p_s_path, n_cut_size); | 1641 | n_cut_size); |
1581 | 1642 | ||
1582 | 1643 | /* Repeat this loop until we either cut the item without needing | |
1583 | /* Repeat this loop until we either cut the item without needing | 1644 | to balance, or we fix_nodes without schedule occurring */ |
1584 | to balance, or we fix_nodes without schedule occurring */ | 1645 | while (1) { |
1585 | while ( 1 ) { | 1646 | /* Determine the balance mode, position of the first byte to |
1586 | /* Determine the balance mode, position of the first byte to | 1647 | be cut, and size to be cut. In case of the indirect item |
1587 | be cut, and size to be cut. In case of the indirect item | 1648 | free unformatted nodes which are pointed to by the cut |
1588 | free unformatted nodes which are pointed to by the cut | 1649 | pointers. */ |
1589 | pointers. */ | 1650 | |
1590 | 1651 | c_mode = | |
1591 | c_mode = prepare_for_delete_or_cut(th, p_s_inode, p_s_path, p_s_item_key, &n_removed, | 1652 | prepare_for_delete_or_cut(th, p_s_inode, p_s_path, |
1592 | &n_cut_size, n_new_file_size); | 1653 | p_s_item_key, &n_removed, |
1593 | if ( c_mode == M_CONVERT ) { | 1654 | &n_cut_size, n_new_file_size); |
1594 | /* convert last unformatted node to direct item or leave | 1655 | if (c_mode == M_CONVERT) { |
1595 | tail in the unformatted node */ | 1656 | /* convert last unformatted node to direct item or leave |
1596 | RFALSE( n_ret_value != CARRY_ON, "PAP-5570: can not convert twice"); | 1657 | tail in the unformatted node */ |
1597 | 1658 | RFALSE(n_ret_value != CARRY_ON, | |
1598 | n_ret_value = maybe_indirect_to_direct (th, p_s_inode, page, p_s_path, p_s_item_key, | 1659 | "PAP-5570: can not convert twice"); |
1599 | n_new_file_size, &c_mode); | 1660 | |
1600 | if ( c_mode == M_SKIP_BALANCING ) | 1661 | n_ret_value = |
1601 | /* tail has been left in the unformatted node */ | 1662 | maybe_indirect_to_direct(th, p_s_inode, page, |
1602 | return n_ret_value; | 1663 | p_s_path, p_s_item_key, |
1603 | 1664 | n_new_file_size, &c_mode); | |
1604 | n_is_inode_locked = 1; | 1665 | if (c_mode == M_SKIP_BALANCING) |
1605 | 1666 | /* tail has been left in the unformatted node */ | |
1606 | /* removing of last unformatted node will change value we | 1667 | return n_ret_value; |
1607 | have to return to truncate. Save it */ | 1668 | |
1608 | retval2 = n_ret_value; | 1669 | n_is_inode_locked = 1; |
1609 | /*retval2 = p_s_sb->s_blocksize - (n_new_file_size & (p_s_sb->s_blocksize - 1));*/ | 1670 | |
1610 | 1671 | /* removing of last unformatted node will change value we | |
1611 | /* So, we have performed the first part of the conversion: | 1672 | have to return to truncate. Save it */ |
1612 | inserting the new direct item. Now we are removing the | 1673 | retval2 = n_ret_value; |
1613 | last unformatted node pointer. Set key to search for | 1674 | /*retval2 = p_s_sb->s_blocksize - (n_new_file_size & (p_s_sb->s_blocksize - 1)); */ |
1614 | it. */ | 1675 | |
1615 | set_cpu_key_k_type (p_s_item_key, TYPE_INDIRECT); | 1676 | /* So, we have performed the first part of the conversion: |
1616 | p_s_item_key->key_length = 4; | 1677 | inserting the new direct item. Now we are removing the |
1617 | n_new_file_size -= (n_new_file_size & (p_s_sb->s_blocksize - 1)); | 1678 | last unformatted node pointer. Set key to search for |
1618 | tail_pos = n_new_file_size; | 1679 | it. */ |
1619 | set_cpu_key_k_offset (p_s_item_key, n_new_file_size + 1); | 1680 | set_cpu_key_k_type(p_s_item_key, TYPE_INDIRECT); |
1620 | if ( search_for_position_by_key(p_s_sb, p_s_item_key, p_s_path) == POSITION_NOT_FOUND ){ | 1681 | p_s_item_key->key_length = 4; |
1621 | print_block (PATH_PLAST_BUFFER (p_s_path), 3, PATH_LAST_POSITION (p_s_path) - 1, PATH_LAST_POSITION (p_s_path) + 1); | 1682 | n_new_file_size -= |
1622 | reiserfs_panic(p_s_sb, "PAP-5580: reiserfs_cut_from_item: item to convert does not exist (%K)", p_s_item_key); | 1683 | (n_new_file_size & (p_s_sb->s_blocksize - 1)); |
1623 | } | 1684 | tail_pos = n_new_file_size; |
1624 | continue; | 1685 | set_cpu_key_k_offset(p_s_item_key, n_new_file_size + 1); |
1625 | } | 1686 | if (search_for_position_by_key |
1626 | if (n_cut_size == 0) { | 1687 | (p_s_sb, p_s_item_key, |
1627 | pathrelse (p_s_path); | 1688 | p_s_path) == POSITION_NOT_FOUND) { |
1628 | return 0; | 1689 | print_block(PATH_PLAST_BUFFER(p_s_path), 3, |
1629 | } | 1690 | PATH_LAST_POSITION(p_s_path) - 1, |
1691 | PATH_LAST_POSITION(p_s_path) + 1); | ||
1692 | reiserfs_panic(p_s_sb, | ||
1693 | "PAP-5580: reiserfs_cut_from_item: item to convert does not exist (%K)", | ||
1694 | p_s_item_key); | ||
1695 | } | ||
1696 | continue; | ||
1697 | } | ||
1698 | if (n_cut_size == 0) { | ||
1699 | pathrelse(p_s_path); | ||
1700 | return 0; | ||
1701 | } | ||
1702 | |||
1703 | s_cut_balance.insert_size[0] = n_cut_size; | ||
1704 | |||
1705 | n_ret_value = fix_nodes(c_mode, &s_cut_balance, NULL, NULL); | ||
1706 | if (n_ret_value != REPEAT_SEARCH) | ||
1707 | break; | ||
1708 | |||
1709 | PROC_INFO_INC(p_s_sb, cut_from_item_restarted); | ||
1710 | |||
1711 | n_ret_value = | ||
1712 | search_for_position_by_key(p_s_sb, p_s_item_key, p_s_path); | ||
1713 | if (n_ret_value == POSITION_FOUND) | ||
1714 | continue; | ||
1630 | 1715 | ||
1631 | s_cut_balance.insert_size[0] = n_cut_size; | 1716 | reiserfs_warning(p_s_sb, |
1632 | 1717 | "PAP-5610: reiserfs_cut_from_item: item %K not found", | |
1633 | n_ret_value = fix_nodes(c_mode, &s_cut_balance, NULL, NULL); | 1718 | p_s_item_key); |
1634 | if ( n_ret_value != REPEAT_SEARCH ) | 1719 | unfix_nodes(&s_cut_balance); |
1635 | break; | 1720 | return (n_ret_value == IO_ERROR) ? -EIO : -ENOENT; |
1636 | 1721 | } /* while */ | |
1637 | PROC_INFO_INC( p_s_sb, cut_from_item_restarted ); | 1722 | |
1638 | 1723 | // check fix_nodes results (IO_ERROR or NO_DISK_SPACE) | |
1639 | n_ret_value = search_for_position_by_key(p_s_sb, p_s_item_key, p_s_path); | 1724 | if (n_ret_value != CARRY_ON) { |
1640 | if (n_ret_value == POSITION_FOUND) | 1725 | if (n_is_inode_locked) { |
1641 | continue; | 1726 | // FIXME: this seems to be not needed: we are always able |
1642 | 1727 | // to cut item | |
1643 | reiserfs_warning (p_s_sb, "PAP-5610: reiserfs_cut_from_item: item %K not found", p_s_item_key); | 1728 | indirect_to_direct_roll_back(th, p_s_inode, p_s_path); |
1644 | unfix_nodes (&s_cut_balance); | 1729 | } |
1645 | return (n_ret_value == IO_ERROR) ? -EIO : -ENOENT; | 1730 | if (n_ret_value == NO_DISK_SPACE) |
1646 | } /* while */ | 1731 | reiserfs_warning(p_s_sb, "NO_DISK_SPACE"); |
1647 | 1732 | unfix_nodes(&s_cut_balance); | |
1648 | // check fix_nodes results (IO_ERROR or NO_DISK_SPACE) | 1733 | return -EIO; |
1649 | if ( n_ret_value != CARRY_ON ) { | ||
1650 | if ( n_is_inode_locked ) { | ||
1651 | // FIXME: this seems to be not needed: we are always able | ||
1652 | // to cut item | ||
1653 | indirect_to_direct_roll_back (th, p_s_inode, p_s_path); | ||
1654 | } | 1734 | } |
1655 | if (n_ret_value == NO_DISK_SPACE) | 1735 | |
1656 | reiserfs_warning (p_s_sb, "NO_DISK_SPACE"); | 1736 | /* go ahead and perform balancing */ |
1657 | unfix_nodes (&s_cut_balance); | 1737 | |
1658 | return -EIO; | 1738 | RFALSE(c_mode == M_PASTE || c_mode == M_INSERT, "invalid mode"); |
1659 | } | 1739 | |
1660 | 1740 | /* Calculate number of bytes that need to be cut from the item. */ | |
1661 | /* go ahead and perform balancing */ | 1741 | quota_cut_bytes = |
1662 | 1742 | (c_mode == | |
1663 | RFALSE( c_mode == M_PASTE || c_mode == M_INSERT, "invalid mode"); | 1743 | M_DELETE) ? ih_item_len(get_ih(p_s_path)) : -s_cut_balance. |
1664 | 1744 | insert_size[0]; | |
1665 | /* Calculate number of bytes that need to be cut from the item. */ | 1745 | if (retval2 == -1) |
1666 | quota_cut_bytes = ( c_mode == M_DELETE ) ? ih_item_len(get_ih(p_s_path)) : -s_cut_balance.insert_size[0]; | 1746 | n_ret_value = calc_deleted_bytes_number(&s_cut_balance, c_mode); |
1667 | if (retval2 == -1) | 1747 | else |
1668 | n_ret_value = calc_deleted_bytes_number(&s_cut_balance, c_mode); | 1748 | n_ret_value = retval2; |
1669 | else | 1749 | |
1670 | n_ret_value = retval2; | 1750 | /* For direct items, we only change the quota when deleting the last |
1671 | 1751 | ** item. | |
1672 | 1752 | */ | |
1673 | /* For direct items, we only change the quota when deleting the last | 1753 | p_le_ih = PATH_PITEM_HEAD(s_cut_balance.tb_path); |
1674 | ** item. | 1754 | if (!S_ISLNK(p_s_inode->i_mode) && is_direct_le_ih(p_le_ih)) { |
1675 | */ | 1755 | if (c_mode == M_DELETE && |
1676 | p_le_ih = PATH_PITEM_HEAD (s_cut_balance.tb_path); | 1756 | (le_ih_k_offset(p_le_ih) & (p_s_sb->s_blocksize - 1)) == |
1677 | if (!S_ISLNK (p_s_inode->i_mode) && is_direct_le_ih(p_le_ih)) { | 1757 | 1) { |
1678 | if (c_mode == M_DELETE && | 1758 | // FIXME: this is to keep 3.5 happy |
1679 | (le_ih_k_offset (p_le_ih) & (p_s_sb->s_blocksize - 1)) == 1 ) { | 1759 | REISERFS_I(p_s_inode)->i_first_direct_byte = U32_MAX; |
1680 | // FIXME: this is to keep 3.5 happy | 1760 | quota_cut_bytes = p_s_sb->s_blocksize + UNFM_P_SIZE; |
1681 | REISERFS_I(p_s_inode)->i_first_direct_byte = U32_MAX; | 1761 | } else { |
1682 | quota_cut_bytes = p_s_sb->s_blocksize + UNFM_P_SIZE ; | 1762 | quota_cut_bytes = 0; |
1683 | } else { | 1763 | } |
1684 | quota_cut_bytes = 0 ; | ||
1685 | } | 1764 | } |
1686 | } | ||
1687 | #ifdef CONFIG_REISERFS_CHECK | 1765 | #ifdef CONFIG_REISERFS_CHECK |
1688 | if (n_is_inode_locked) { | 1766 | if (n_is_inode_locked) { |
1689 | struct item_head * le_ih = PATH_PITEM_HEAD (s_cut_balance.tb_path); | 1767 | struct item_head *le_ih = |
1690 | /* we are going to complete indirect2direct conversion. Make | 1768 | PATH_PITEM_HEAD(s_cut_balance.tb_path); |
1691 | sure, that we exactly remove last unformatted node pointer | 1769 | /* we are going to complete indirect2direct conversion. Make |
1692 | of the item */ | 1770 | sure, that we exactly remove last unformatted node pointer |
1693 | if (!is_indirect_le_ih (le_ih)) | 1771 | of the item */ |
1694 | reiserfs_panic (p_s_sb, "vs-5652: reiserfs_cut_from_item: " | 1772 | if (!is_indirect_le_ih(le_ih)) |
1695 | "item must be indirect %h", le_ih); | 1773 | reiserfs_panic(p_s_sb, |
1696 | 1774 | "vs-5652: reiserfs_cut_from_item: " | |
1697 | if (c_mode == M_DELETE && ih_item_len(le_ih) != UNFM_P_SIZE) | 1775 | "item must be indirect %h", le_ih); |
1698 | reiserfs_panic (p_s_sb, "vs-5653: reiserfs_cut_from_item: " | 1776 | |
1699 | "completing indirect2direct conversion indirect item %h " | 1777 | if (c_mode == M_DELETE && ih_item_len(le_ih) != UNFM_P_SIZE) |
1700 | "being deleted must be of 4 byte long", le_ih); | 1778 | reiserfs_panic(p_s_sb, |
1701 | 1779 | "vs-5653: reiserfs_cut_from_item: " | |
1702 | if (c_mode == M_CUT && s_cut_balance.insert_size[0] != -UNFM_P_SIZE) { | 1780 | "completing indirect2direct conversion indirect item %h " |
1703 | reiserfs_panic (p_s_sb, "vs-5654: reiserfs_cut_from_item: " | 1781 | "being deleted must be of 4 byte long", |
1704 | "can not complete indirect2direct conversion of %h (CUT, insert_size==%d)", | 1782 | le_ih); |
1705 | le_ih, s_cut_balance.insert_size[0]); | 1783 | |
1784 | if (c_mode == M_CUT | ||
1785 | && s_cut_balance.insert_size[0] != -UNFM_P_SIZE) { | ||
1786 | reiserfs_panic(p_s_sb, | ||
1787 | "vs-5654: reiserfs_cut_from_item: " | ||
1788 | "can not complete indirect2direct conversion of %h (CUT, insert_size==%d)", | ||
1789 | le_ih, s_cut_balance.insert_size[0]); | ||
1790 | } | ||
1791 | /* it would be useful to make sure, that right neighboring | ||
1792 | item is direct item of this file */ | ||
1706 | } | 1793 | } |
1707 | /* it would be useful to make sure, that right neighboring | ||
1708 | item is direct item of this file */ | ||
1709 | } | ||
1710 | #endif | 1794 | #endif |
1711 | 1795 | ||
1712 | do_balance(&s_cut_balance, NULL, NULL, c_mode); | 1796 | do_balance(&s_cut_balance, NULL, NULL, c_mode); |
1713 | if ( n_is_inode_locked ) { | 1797 | if (n_is_inode_locked) { |
1714 | /* we've done an indirect->direct conversion. when the data block | 1798 | /* we've done an indirect->direct conversion. when the data block |
1715 | ** was freed, it was removed from the list of blocks that must | 1799 | ** was freed, it was removed from the list of blocks that must |
1716 | ** be flushed before the transaction commits, make sure to | 1800 | ** be flushed before the transaction commits, make sure to |
1717 | ** unmap and invalidate it | 1801 | ** unmap and invalidate it |
1718 | */ | 1802 | */ |
1719 | unmap_buffers(page, tail_pos); | 1803 | unmap_buffers(page, tail_pos); |
1720 | REISERFS_I(p_s_inode)->i_flags &= ~i_pack_on_close_mask ; | 1804 | REISERFS_I(p_s_inode)->i_flags &= ~i_pack_on_close_mask; |
1721 | } | 1805 | } |
1722 | #ifdef REISERQUOTA_DEBUG | 1806 | #ifdef REISERQUOTA_DEBUG |
1723 | reiserfs_debug (p_s_inode->i_sb, REISERFS_DEBUG_CODE, "reiserquota cut_from_item(): freeing %u id=%u type=%c", quota_cut_bytes, p_s_inode->i_uid, '?'); | 1807 | reiserfs_debug(p_s_inode->i_sb, REISERFS_DEBUG_CODE, |
1808 | "reiserquota cut_from_item(): freeing %u id=%u type=%c", | ||
1809 | quota_cut_bytes, p_s_inode->i_uid, '?'); | ||
1724 | #endif | 1810 | #endif |
1725 | DQUOT_FREE_SPACE_NODIRTY(p_s_inode, quota_cut_bytes); | 1811 | DQUOT_FREE_SPACE_NODIRTY(p_s_inode, quota_cut_bytes); |
1726 | return n_ret_value; | 1812 | return n_ret_value; |
1727 | } | 1813 | } |
1728 | 1814 | ||
1729 | static void truncate_directory (struct reiserfs_transaction_handle *th, struct inode * inode) | 1815 | static void truncate_directory(struct reiserfs_transaction_handle *th, |
1816 | struct inode *inode) | ||
1730 | { | 1817 | { |
1731 | BUG_ON (!th->t_trans_id); | 1818 | BUG_ON(!th->t_trans_id); |
1732 | if (inode->i_nlink) | 1819 | if (inode->i_nlink) |
1733 | reiserfs_warning (inode->i_sb, | 1820 | reiserfs_warning(inode->i_sb, |
1734 | "vs-5655: truncate_directory: link count != 0"); | 1821 | "vs-5655: truncate_directory: link count != 0"); |
1735 | 1822 | ||
1736 | set_le_key_k_offset (KEY_FORMAT_3_5, INODE_PKEY (inode), DOT_OFFSET); | 1823 | set_le_key_k_offset(KEY_FORMAT_3_5, INODE_PKEY(inode), DOT_OFFSET); |
1737 | set_le_key_k_type (KEY_FORMAT_3_5, INODE_PKEY (inode), TYPE_DIRENTRY); | 1824 | set_le_key_k_type(KEY_FORMAT_3_5, INODE_PKEY(inode), TYPE_DIRENTRY); |
1738 | reiserfs_delete_solid_item (th, inode, INODE_PKEY (inode)); | 1825 | reiserfs_delete_solid_item(th, inode, INODE_PKEY(inode)); |
1739 | reiserfs_update_sd(th, inode) ; | 1826 | reiserfs_update_sd(th, inode); |
1740 | set_le_key_k_offset (KEY_FORMAT_3_5, INODE_PKEY (inode), SD_OFFSET); | 1827 | set_le_key_k_offset(KEY_FORMAT_3_5, INODE_PKEY(inode), SD_OFFSET); |
1741 | set_le_key_k_type (KEY_FORMAT_3_5, INODE_PKEY (inode), TYPE_STAT_DATA); | 1828 | set_le_key_k_type(KEY_FORMAT_3_5, INODE_PKEY(inode), TYPE_STAT_DATA); |
1742 | } | 1829 | } |
1743 | 1830 | ||
1831 | /* Truncate file to the new size. Note, this must be called with a transaction | ||
1832 | already started */ | ||
1833 | int reiserfs_do_truncate(struct reiserfs_transaction_handle *th, struct inode *p_s_inode, /* ->i_size contains new | ||
1834 | size */ | ||
1835 | struct page *page, /* up to date for last block */ | ||
1836 | int update_timestamps /* when it is called by | ||
1837 | file_release to convert | ||
1838 | the tail - no timestamps | ||
1839 | should be updated */ | ||
1840 | ) | ||
1841 | { | ||
1842 | INITIALIZE_PATH(s_search_path); /* Path to the current object item. */ | ||
1843 | struct item_head *p_le_ih; /* Pointer to an item header. */ | ||
1844 | struct cpu_key s_item_key; /* Key to search for a previous file item. */ | ||
1845 | loff_t n_file_size, /* Old file size. */ | ||
1846 | n_new_file_size; /* New file size. */ | ||
1847 | int n_deleted; /* Number of deleted or truncated bytes. */ | ||
1848 | int retval; | ||
1849 | int err = 0; | ||
1850 | |||
1851 | BUG_ON(!th->t_trans_id); | ||
1852 | if (! | ||
1853 | (S_ISREG(p_s_inode->i_mode) || S_ISDIR(p_s_inode->i_mode) | ||
1854 | || S_ISLNK(p_s_inode->i_mode))) | ||
1855 | return 0; | ||
1856 | |||
1857 | if (S_ISDIR(p_s_inode->i_mode)) { | ||
1858 | // deletion of directory - no need to update timestamps | ||
1859 | truncate_directory(th, p_s_inode); | ||
1860 | return 0; | ||
1861 | } | ||
1744 | 1862 | ||
1863 | /* Get new file size. */ | ||
1864 | n_new_file_size = p_s_inode->i_size; | ||
1745 | 1865 | ||
1866 | // FIXME: note, that key type is unimportant here | ||
1867 | make_cpu_key(&s_item_key, p_s_inode, max_reiserfs_offset(p_s_inode), | ||
1868 | TYPE_DIRECT, 3); | ||
1746 | 1869 | ||
1747 | /* Truncate file to the new size. Note, this must be called with a transaction | 1870 | retval = |
1748 | already started */ | 1871 | search_for_position_by_key(p_s_inode->i_sb, &s_item_key, |
1749 | int reiserfs_do_truncate (struct reiserfs_transaction_handle *th, | 1872 | &s_search_path); |
1750 | struct inode * p_s_inode, /* ->i_size contains new | 1873 | if (retval == IO_ERROR) { |
1751 | size */ | 1874 | reiserfs_warning(p_s_inode->i_sb, |
1752 | struct page *page, /* up to date for last block */ | 1875 | "vs-5657: reiserfs_do_truncate: " |
1753 | int update_timestamps /* when it is called by | 1876 | "i/o failure occurred trying to truncate %K", |
1754 | file_release to convert | 1877 | &s_item_key); |
1755 | the tail - no timestamps | 1878 | err = -EIO; |
1756 | should be updated */ | 1879 | goto out; |
1757 | ) { | 1880 | } |
1758 | INITIALIZE_PATH (s_search_path); /* Path to the current object item. */ | 1881 | if (retval == POSITION_FOUND || retval == FILE_NOT_FOUND) { |
1759 | struct item_head * p_le_ih; /* Pointer to an item header. */ | 1882 | reiserfs_warning(p_s_inode->i_sb, |
1760 | struct cpu_key s_item_key; /* Key to search for a previous file item. */ | 1883 | "PAP-5660: reiserfs_do_truncate: " |
1761 | loff_t n_file_size, /* Old file size. */ | 1884 | "wrong result %d of search for %K", retval, |
1762 | n_new_file_size;/* New file size. */ | 1885 | &s_item_key); |
1763 | int n_deleted; /* Number of deleted or truncated bytes. */ | 1886 | |
1764 | int retval; | 1887 | err = -EIO; |
1765 | int err = 0; | 1888 | goto out; |
1766 | 1889 | } | |
1767 | BUG_ON (!th->t_trans_id); | ||
1768 | if ( ! (S_ISREG(p_s_inode->i_mode) || S_ISDIR(p_s_inode->i_mode) || S_ISLNK(p_s_inode->i_mode)) ) | ||
1769 | return 0; | ||
1770 | 1890 | ||
1771 | if (S_ISDIR(p_s_inode->i_mode)) { | 1891 | s_search_path.pos_in_item--; |
1772 | // deletion of directory - no need to update timestamps | 1892 | |
1773 | truncate_directory (th, p_s_inode); | 1893 | /* Get real file size (total length of all file items) */ |
1774 | return 0; | 1894 | p_le_ih = PATH_PITEM_HEAD(&s_search_path); |
1775 | } | 1895 | if (is_statdata_le_ih(p_le_ih)) |
1776 | 1896 | n_file_size = 0; | |
1777 | /* Get new file size. */ | 1897 | else { |
1778 | n_new_file_size = p_s_inode->i_size; | 1898 | loff_t offset = le_ih_k_offset(p_le_ih); |
1779 | 1899 | int bytes = | |
1780 | // FIXME: note, that key type is unimportant here | 1900 | op_bytes_number(p_le_ih, p_s_inode->i_sb->s_blocksize); |
1781 | make_cpu_key (&s_item_key, p_s_inode, max_reiserfs_offset (p_s_inode), TYPE_DIRECT, 3); | 1901 | |
1782 | 1902 | /* this may mismatch with real file size: if last direct item | |
1783 | retval = search_for_position_by_key(p_s_inode->i_sb, &s_item_key, &s_search_path); | 1903 | had no padding zeros and last unformatted node had no free |
1784 | if (retval == IO_ERROR) { | 1904 | space, this file would have this file size */ |
1785 | reiserfs_warning (p_s_inode->i_sb, "vs-5657: reiserfs_do_truncate: " | 1905 | n_file_size = offset + bytes - 1; |
1786 | "i/o failure occurred trying to truncate %K", &s_item_key); | 1906 | } |
1787 | err = -EIO; | 1907 | /* |
1788 | goto out; | 1908 | * are we doing a full truncate or delete, if so |
1789 | } | 1909 | * kick in the reada code |
1790 | if (retval == POSITION_FOUND || retval == FILE_NOT_FOUND) { | 1910 | */ |
1791 | reiserfs_warning (p_s_inode->i_sb, "PAP-5660: reiserfs_do_truncate: " | 1911 | if (n_new_file_size == 0) |
1792 | "wrong result %d of search for %K", retval, &s_item_key); | 1912 | s_search_path.reada = PATH_READA | PATH_READA_BACK; |
1793 | 1913 | ||
1794 | err = -EIO; | 1914 | if (n_file_size == 0 || n_file_size < n_new_file_size) { |
1795 | goto out; | 1915 | goto update_and_out; |
1796 | } | ||
1797 | |||
1798 | s_search_path.pos_in_item --; | ||
1799 | |||
1800 | /* Get real file size (total length of all file items) */ | ||
1801 | p_le_ih = PATH_PITEM_HEAD(&s_search_path); | ||
1802 | if ( is_statdata_le_ih (p_le_ih) ) | ||
1803 | n_file_size = 0; | ||
1804 | else { | ||
1805 | loff_t offset = le_ih_k_offset (p_le_ih); | ||
1806 | int bytes = op_bytes_number (p_le_ih,p_s_inode->i_sb->s_blocksize); | ||
1807 | |||
1808 | /* this may mismatch with real file size: if last direct item | ||
1809 | had no padding zeros and last unformatted node had no free | ||
1810 | space, this file would have this file size */ | ||
1811 | n_file_size = offset + bytes - 1; | ||
1812 | } | ||
1813 | /* | ||
1814 | * are we doing a full truncate or delete, if so | ||
1815 | * kick in the reada code | ||
1816 | */ | ||
1817 | if (n_new_file_size == 0) | ||
1818 | s_search_path.reada = PATH_READA | PATH_READA_BACK; | ||
1819 | |||
1820 | if ( n_file_size == 0 || n_file_size < n_new_file_size ) { | ||
1821 | goto update_and_out ; | ||
1822 | } | ||
1823 | |||
1824 | /* Update key to search for the last file item. */ | ||
1825 | set_cpu_key_k_offset (&s_item_key, n_file_size); | ||
1826 | |||
1827 | do { | ||
1828 | /* Cut or delete file item. */ | ||
1829 | n_deleted = reiserfs_cut_from_item(th, &s_search_path, &s_item_key, p_s_inode, page, n_new_file_size); | ||
1830 | if (n_deleted < 0) { | ||
1831 | reiserfs_warning (p_s_inode->i_sb, "vs-5665: reiserfs_do_truncate: reiserfs_cut_from_item failed"); | ||
1832 | reiserfs_check_path(&s_search_path) ; | ||
1833 | return 0; | ||
1834 | } | 1916 | } |
1835 | 1917 | ||
1836 | RFALSE( n_deleted > n_file_size, | 1918 | /* Update key to search for the last file item. */ |
1837 | "PAP-5670: reiserfs_cut_from_item: too many bytes deleted: deleted %d, file_size %lu, item_key %K", | 1919 | set_cpu_key_k_offset(&s_item_key, n_file_size); |
1838 | n_deleted, n_file_size, &s_item_key); | 1920 | |
1921 | do { | ||
1922 | /* Cut or delete file item. */ | ||
1923 | n_deleted = | ||
1924 | reiserfs_cut_from_item(th, &s_search_path, &s_item_key, | ||
1925 | p_s_inode, page, n_new_file_size); | ||
1926 | if (n_deleted < 0) { | ||
1927 | reiserfs_warning(p_s_inode->i_sb, | ||
1928 | "vs-5665: reiserfs_do_truncate: reiserfs_cut_from_item failed"); | ||
1929 | reiserfs_check_path(&s_search_path); | ||
1930 | return 0; | ||
1931 | } | ||
1839 | 1932 | ||
1840 | /* Change key to search the last file item. */ | 1933 | RFALSE(n_deleted > n_file_size, |
1841 | n_file_size -= n_deleted; | 1934 | "PAP-5670: reiserfs_cut_from_item: too many bytes deleted: deleted %d, file_size %lu, item_key %K", |
1935 | n_deleted, n_file_size, &s_item_key); | ||
1842 | 1936 | ||
1843 | set_cpu_key_k_offset (&s_item_key, n_file_size); | 1937 | /* Change key to search the last file item. */ |
1938 | n_file_size -= n_deleted; | ||
1844 | 1939 | ||
1845 | /* While there are bytes to truncate and previous file item is presented in the tree. */ | 1940 | set_cpu_key_k_offset(&s_item_key, n_file_size); |
1846 | 1941 | ||
1847 | /* | 1942 | /* While there are bytes to truncate and previous file item is presented in the tree. */ |
1848 | ** This loop could take a really long time, and could log | 1943 | |
1849 | ** many more blocks than a transaction can hold. So, we do a polite | 1944 | /* |
1850 | ** journal end here, and if the transaction needs ending, we make | 1945 | ** This loop could take a really long time, and could log |
1851 | ** sure the file is consistent before ending the current trans | 1946 | ** many more blocks than a transaction can hold. So, we do a polite |
1852 | ** and starting a new one | 1947 | ** journal end here, and if the transaction needs ending, we make |
1853 | */ | 1948 | ** sure the file is consistent before ending the current trans |
1854 | if (journal_transaction_should_end(th, th->t_blocks_allocated)) { | 1949 | ** and starting a new one |
1855 | int orig_len_alloc = th->t_blocks_allocated ; | 1950 | */ |
1856 | decrement_counters_in_path(&s_search_path) ; | 1951 | if (journal_transaction_should_end(th, th->t_blocks_allocated)) { |
1857 | 1952 | int orig_len_alloc = th->t_blocks_allocated; | |
1858 | if (update_timestamps) { | 1953 | decrement_counters_in_path(&s_search_path); |
1859 | p_s_inode->i_mtime = p_s_inode->i_ctime = CURRENT_TIME_SEC; | 1954 | |
1860 | } | 1955 | if (update_timestamps) { |
1861 | reiserfs_update_sd(th, p_s_inode) ; | 1956 | p_s_inode->i_mtime = p_s_inode->i_ctime = |
1862 | 1957 | CURRENT_TIME_SEC; | |
1863 | err = journal_end(th, p_s_inode->i_sb, orig_len_alloc) ; | 1958 | } |
1864 | if (err) | 1959 | reiserfs_update_sd(th, p_s_inode); |
1865 | goto out; | 1960 | |
1866 | err = journal_begin (th, p_s_inode->i_sb, | 1961 | err = journal_end(th, p_s_inode->i_sb, orig_len_alloc); |
1867 | JOURNAL_PER_BALANCE_CNT * 6); | 1962 | if (err) |
1868 | if (err) | 1963 | goto out; |
1869 | goto out; | 1964 | err = journal_begin(th, p_s_inode->i_sb, |
1870 | reiserfs_update_inode_transaction(p_s_inode) ; | 1965 | JOURNAL_PER_BALANCE_CNT * 6); |
1966 | if (err) | ||
1967 | goto out; | ||
1968 | reiserfs_update_inode_transaction(p_s_inode); | ||
1969 | } | ||
1970 | } while (n_file_size > ROUND_UP(n_new_file_size) && | ||
1971 | search_for_position_by_key(p_s_inode->i_sb, &s_item_key, | ||
1972 | &s_search_path) == POSITION_FOUND); | ||
1973 | |||
1974 | RFALSE(n_file_size > ROUND_UP(n_new_file_size), | ||
1975 | "PAP-5680: truncate did not finish: new_file_size %Ld, current %Ld, oid %d", | ||
1976 | n_new_file_size, n_file_size, s_item_key.on_disk_key.k_objectid); | ||
1977 | |||
1978 | update_and_out: | ||
1979 | if (update_timestamps) { | ||
1980 | // this is truncate, not file closing | ||
1981 | p_s_inode->i_mtime = p_s_inode->i_ctime = CURRENT_TIME_SEC; | ||
1871 | } | 1982 | } |
1872 | } while ( n_file_size > ROUND_UP (n_new_file_size) && | 1983 | reiserfs_update_sd(th, p_s_inode); |
1873 | search_for_position_by_key(p_s_inode->i_sb, &s_item_key, &s_search_path) == POSITION_FOUND ) ; | ||
1874 | |||
1875 | RFALSE( n_file_size > ROUND_UP (n_new_file_size), | ||
1876 | "PAP-5680: truncate did not finish: new_file_size %Ld, current %Ld, oid %d", | ||
1877 | n_new_file_size, n_file_size, s_item_key.on_disk_key.k_objectid); | ||
1878 | |||
1879 | update_and_out: | ||
1880 | if (update_timestamps) { | ||
1881 | // this is truncate, not file closing | ||
1882 | p_s_inode->i_mtime = p_s_inode->i_ctime = CURRENT_TIME_SEC; | ||
1883 | } | ||
1884 | reiserfs_update_sd (th, p_s_inode); | ||
1885 | |||
1886 | out: | ||
1887 | pathrelse(&s_search_path) ; | ||
1888 | return err; | ||
1889 | } | ||
1890 | 1984 | ||
1985 | out: | ||
1986 | pathrelse(&s_search_path); | ||
1987 | return err; | ||
1988 | } | ||
1891 | 1989 | ||
1892 | #ifdef CONFIG_REISERFS_CHECK | 1990 | #ifdef CONFIG_REISERFS_CHECK |
1893 | // this makes sure, that we __append__, not overwrite or add holes | 1991 | // this makes sure, that we __append__, not overwrite or add holes |
1894 | static void check_research_for_paste (struct path * path, | 1992 | static void check_research_for_paste(struct path *path, |
1895 | const struct cpu_key * p_s_key) | 1993 | const struct cpu_key *p_s_key) |
1896 | { | 1994 | { |
1897 | struct item_head * found_ih = get_ih (path); | 1995 | struct item_head *found_ih = get_ih(path); |
1898 | 1996 | ||
1899 | if (is_direct_le_ih (found_ih)) { | 1997 | if (is_direct_le_ih(found_ih)) { |
1900 | if (le_ih_k_offset (found_ih) + op_bytes_number (found_ih, get_last_bh (path)->b_size) != | 1998 | if (le_ih_k_offset(found_ih) + |
1901 | cpu_key_k_offset (p_s_key) || | 1999 | op_bytes_number(found_ih, |
1902 | op_bytes_number (found_ih, get_last_bh (path)->b_size) != pos_in_item (path)) | 2000 | get_last_bh(path)->b_size) != |
1903 | reiserfs_panic (NULL, "PAP-5720: check_research_for_paste: " | 2001 | cpu_key_k_offset(p_s_key) |
1904 | "found direct item %h or position (%d) does not match to key %K", | 2002 | || op_bytes_number(found_ih, |
1905 | found_ih, pos_in_item (path), p_s_key); | 2003 | get_last_bh(path)->b_size) != |
1906 | } | 2004 | pos_in_item(path)) |
1907 | if (is_indirect_le_ih (found_ih)) { | 2005 | reiserfs_panic(NULL, |
1908 | if (le_ih_k_offset (found_ih) + op_bytes_number (found_ih, get_last_bh (path)->b_size) != cpu_key_k_offset (p_s_key) || | 2006 | "PAP-5720: check_research_for_paste: " |
1909 | I_UNFM_NUM (found_ih) != pos_in_item (path) || | 2007 | "found direct item %h or position (%d) does not match to key %K", |
1910 | get_ih_free_space (found_ih) != 0) | 2008 | found_ih, pos_in_item(path), p_s_key); |
1911 | reiserfs_panic (NULL, "PAP-5730: check_research_for_paste: " | 2009 | } |
1912 | "found indirect item (%h) or position (%d) does not match to key (%K)", | 2010 | if (is_indirect_le_ih(found_ih)) { |
1913 | found_ih, pos_in_item (path), p_s_key); | 2011 | if (le_ih_k_offset(found_ih) + |
1914 | } | 2012 | op_bytes_number(found_ih, |
2013 | get_last_bh(path)->b_size) != | ||
2014 | cpu_key_k_offset(p_s_key) | ||
2015 | || I_UNFM_NUM(found_ih) != pos_in_item(path) | ||
2016 | || get_ih_free_space(found_ih) != 0) | ||
2017 | reiserfs_panic(NULL, | ||
2018 | "PAP-5730: check_research_for_paste: " | ||
2019 | "found indirect item (%h) or position (%d) does not match to key (%K)", | ||
2020 | found_ih, pos_in_item(path), p_s_key); | ||
2021 | } | ||
1915 | } | 2022 | } |
1916 | #endif /* config reiserfs check */ | 2023 | #endif /* config reiserfs check */ |
1917 | |||
1918 | 2024 | ||
1919 | /* Paste bytes to the existing item. Returns bytes number pasted into the item. */ | 2025 | /* Paste bytes to the existing item. Returns bytes number pasted into the item. */ |
1920 | int reiserfs_paste_into_item (struct reiserfs_transaction_handle *th, | 2026 | int reiserfs_paste_into_item(struct reiserfs_transaction_handle *th, struct path *p_s_search_path, /* Path to the pasted item. */ |
1921 | struct path * p_s_search_path, /* Path to the pasted item. */ | 2027 | const struct cpu_key *p_s_key, /* Key to search for the needed item. */ |
1922 | const struct cpu_key * p_s_key, /* Key to search for the needed item.*/ | 2028 | struct inode *inode, /* Inode item belongs to */ |
1923 | struct inode * inode, /* Inode item belongs to */ | 2029 | const char *p_c_body, /* Pointer to the bytes to paste. */ |
1924 | const char * p_c_body, /* Pointer to the bytes to paste. */ | 2030 | int n_pasted_size) |
1925 | int n_pasted_size) /* Size of pasted bytes. */ | 2031 | { /* Size of pasted bytes. */ |
1926 | { | 2032 | struct tree_balance s_paste_balance; |
1927 | struct tree_balance s_paste_balance; | 2033 | int retval; |
1928 | int retval; | 2034 | int fs_gen; |
1929 | int fs_gen; | 2035 | |
2036 | BUG_ON(!th->t_trans_id); | ||
1930 | 2037 | ||
1931 | BUG_ON (!th->t_trans_id); | 2038 | fs_gen = get_generation(inode->i_sb); |
1932 | |||
1933 | fs_gen = get_generation(inode->i_sb) ; | ||
1934 | 2039 | ||
1935 | #ifdef REISERQUOTA_DEBUG | 2040 | #ifdef REISERQUOTA_DEBUG |
1936 | reiserfs_debug (inode->i_sb, REISERFS_DEBUG_CODE, "reiserquota paste_into_item(): allocating %u id=%u type=%c", n_pasted_size, inode->i_uid, key2type(&(p_s_key->on_disk_key))); | 2041 | reiserfs_debug(inode->i_sb, REISERFS_DEBUG_CODE, |
2042 | "reiserquota paste_into_item(): allocating %u id=%u type=%c", | ||
2043 | n_pasted_size, inode->i_uid, | ||
2044 | key2type(&(p_s_key->on_disk_key))); | ||
1937 | #endif | 2045 | #endif |
1938 | 2046 | ||
1939 | if (DQUOT_ALLOC_SPACE_NODIRTY(inode, n_pasted_size)) { | 2047 | if (DQUOT_ALLOC_SPACE_NODIRTY(inode, n_pasted_size)) { |
1940 | pathrelse(p_s_search_path); | 2048 | pathrelse(p_s_search_path); |
1941 | return -EDQUOT; | 2049 | return -EDQUOT; |
1942 | } | 2050 | } |
1943 | init_tb_struct(th, &s_paste_balance, th->t_super, p_s_search_path, n_pasted_size); | 2051 | init_tb_struct(th, &s_paste_balance, th->t_super, p_s_search_path, |
2052 | n_pasted_size); | ||
1944 | #ifdef DISPLACE_NEW_PACKING_LOCALITIES | 2053 | #ifdef DISPLACE_NEW_PACKING_LOCALITIES |
1945 | s_paste_balance.key = p_s_key->on_disk_key; | 2054 | s_paste_balance.key = p_s_key->on_disk_key; |
1946 | #endif | 2055 | #endif |
1947 | 2056 | ||
1948 | /* DQUOT_* can schedule, must check before the fix_nodes */ | 2057 | /* DQUOT_* can schedule, must check before the fix_nodes */ |
1949 | if (fs_changed(fs_gen, inode->i_sb)) { | 2058 | if (fs_changed(fs_gen, inode->i_sb)) { |
1950 | goto search_again; | 2059 | goto search_again; |
1951 | } | ||
1952 | |||
1953 | while ((retval = fix_nodes(M_PASTE, &s_paste_balance, NULL, p_c_body)) == | ||
1954 | REPEAT_SEARCH ) { | ||
1955 | search_again: | ||
1956 | /* file system changed while we were in the fix_nodes */ | ||
1957 | PROC_INFO_INC( th -> t_super, paste_into_item_restarted ); | ||
1958 | retval = search_for_position_by_key (th->t_super, p_s_key, p_s_search_path); | ||
1959 | if (retval == IO_ERROR) { | ||
1960 | retval = -EIO ; | ||
1961 | goto error_out ; | ||
1962 | } | 2060 | } |
1963 | if (retval == POSITION_FOUND) { | 2061 | |
1964 | reiserfs_warning (inode->i_sb, "PAP-5710: reiserfs_paste_into_item: entry or pasted byte (%K) exists", p_s_key); | 2062 | while ((retval = |
1965 | retval = -EEXIST ; | 2063 | fix_nodes(M_PASTE, &s_paste_balance, NULL, |
1966 | goto error_out ; | 2064 | p_c_body)) == REPEAT_SEARCH) { |
1967 | } | 2065 | search_again: |
1968 | 2066 | /* file system changed while we were in the fix_nodes */ | |
2067 | PROC_INFO_INC(th->t_super, paste_into_item_restarted); | ||
2068 | retval = | ||
2069 | search_for_position_by_key(th->t_super, p_s_key, | ||
2070 | p_s_search_path); | ||
2071 | if (retval == IO_ERROR) { | ||
2072 | retval = -EIO; | ||
2073 | goto error_out; | ||
2074 | } | ||
2075 | if (retval == POSITION_FOUND) { | ||
2076 | reiserfs_warning(inode->i_sb, | ||
2077 | "PAP-5710: reiserfs_paste_into_item: entry or pasted byte (%K) exists", | ||
2078 | p_s_key); | ||
2079 | retval = -EEXIST; | ||
2080 | goto error_out; | ||
2081 | } | ||
1969 | #ifdef CONFIG_REISERFS_CHECK | 2082 | #ifdef CONFIG_REISERFS_CHECK |
1970 | check_research_for_paste (p_s_search_path, p_s_key); | 2083 | check_research_for_paste(p_s_search_path, p_s_key); |
1971 | #endif | 2084 | #endif |
1972 | } | 2085 | } |
1973 | 2086 | ||
1974 | /* Perform balancing after all resources are collected by fix_nodes, and | 2087 | /* Perform balancing after all resources are collected by fix_nodes, and |
1975 | accessing them will not risk triggering schedule. */ | 2088 | accessing them will not risk triggering schedule. */ |
1976 | if ( retval == CARRY_ON ) { | 2089 | if (retval == CARRY_ON) { |
1977 | do_balance(&s_paste_balance, NULL/*ih*/, p_c_body, M_PASTE); | 2090 | do_balance(&s_paste_balance, NULL /*ih */ , p_c_body, M_PASTE); |
1978 | return 0; | 2091 | return 0; |
1979 | } | 2092 | } |
1980 | retval = (retval == NO_DISK_SPACE) ? -ENOSPC : -EIO; | 2093 | retval = (retval == NO_DISK_SPACE) ? -ENOSPC : -EIO; |
1981 | error_out: | 2094 | error_out: |
1982 | /* this also releases the path */ | 2095 | /* this also releases the path */ |
1983 | unfix_nodes(&s_paste_balance); | 2096 | unfix_nodes(&s_paste_balance); |
1984 | #ifdef REISERQUOTA_DEBUG | 2097 | #ifdef REISERQUOTA_DEBUG |
1985 | reiserfs_debug (inode->i_sb, REISERFS_DEBUG_CODE, "reiserquota paste_into_item(): freeing %u id=%u type=%c", n_pasted_size, inode->i_uid, key2type(&(p_s_key->on_disk_key))); | 2098 | reiserfs_debug(inode->i_sb, REISERFS_DEBUG_CODE, |
2099 | "reiserquota paste_into_item(): freeing %u id=%u type=%c", | ||
2100 | n_pasted_size, inode->i_uid, | ||
2101 | key2type(&(p_s_key->on_disk_key))); | ||
1986 | #endif | 2102 | #endif |
1987 | DQUOT_FREE_SPACE_NODIRTY(inode, n_pasted_size); | 2103 | DQUOT_FREE_SPACE_NODIRTY(inode, n_pasted_size); |
1988 | return retval ; | 2104 | return retval; |
1989 | } | 2105 | } |
1990 | 2106 | ||
1991 | |||
1992 | /* Insert new item into the buffer at the path. */ | 2107 | /* Insert new item into the buffer at the path. */ |
1993 | int reiserfs_insert_item(struct reiserfs_transaction_handle *th, | 2108 | int reiserfs_insert_item(struct reiserfs_transaction_handle *th, struct path *p_s_path, /* Path to the inserteded item. */ |
1994 | struct path * p_s_path, /* Path to the inserteded item. */ | 2109 | const struct cpu_key *key, struct item_head *p_s_ih, /* Pointer to the item header to insert. */ |
1995 | const struct cpu_key * key, | 2110 | struct inode *inode, const char *p_c_body) |
1996 | struct item_head * p_s_ih, /* Pointer to the item header to insert.*/ | 2111 | { /* Pointer to the bytes to insert. */ |
1997 | struct inode * inode, | 2112 | struct tree_balance s_ins_balance; |
1998 | const char * p_c_body) /* Pointer to the bytes to insert. */ | 2113 | int retval; |
1999 | { | 2114 | int fs_gen = 0; |
2000 | struct tree_balance s_ins_balance; | 2115 | int quota_bytes = 0; |
2001 | int retval; | 2116 | |
2002 | int fs_gen = 0 ; | 2117 | BUG_ON(!th->t_trans_id); |
2003 | int quota_bytes = 0 ; | 2118 | |
2004 | 2119 | if (inode) { /* Do we count quotas for item? */ | |
2005 | BUG_ON (!th->t_trans_id); | 2120 | fs_gen = get_generation(inode->i_sb); |
2006 | 2121 | quota_bytes = ih_item_len(p_s_ih); | |
2007 | if (inode) { /* Do we count quotas for item? */ | 2122 | |
2008 | fs_gen = get_generation(inode->i_sb); | 2123 | /* hack so the quota code doesn't have to guess if the file has |
2009 | quota_bytes = ih_item_len(p_s_ih); | 2124 | ** a tail, links are always tails, so there's no guessing needed |
2010 | 2125 | */ | |
2011 | /* hack so the quota code doesn't have to guess if the file has | 2126 | if (!S_ISLNK(inode->i_mode) && is_direct_le_ih(p_s_ih)) { |
2012 | ** a tail, links are always tails, so there's no guessing needed | 2127 | quota_bytes = inode->i_sb->s_blocksize + UNFM_P_SIZE; |
2013 | */ | 2128 | } |
2014 | if (!S_ISLNK (inode->i_mode) && is_direct_le_ih(p_s_ih)) { | ||
2015 | quota_bytes = inode->i_sb->s_blocksize + UNFM_P_SIZE ; | ||
2016 | } | ||
2017 | #ifdef REISERQUOTA_DEBUG | 2129 | #ifdef REISERQUOTA_DEBUG |
2018 | reiserfs_debug (inode->i_sb, REISERFS_DEBUG_CODE, "reiserquota insert_item(): allocating %u id=%u type=%c", quota_bytes, inode->i_uid, head2type(p_s_ih)); | 2130 | reiserfs_debug(inode->i_sb, REISERFS_DEBUG_CODE, |
2131 | "reiserquota insert_item(): allocating %u id=%u type=%c", | ||
2132 | quota_bytes, inode->i_uid, head2type(p_s_ih)); | ||
2019 | #endif | 2133 | #endif |
2020 | /* We can't dirty inode here. It would be immediately written but | 2134 | /* We can't dirty inode here. It would be immediately written but |
2021 | * appropriate stat item isn't inserted yet... */ | 2135 | * appropriate stat item isn't inserted yet... */ |
2022 | if (DQUOT_ALLOC_SPACE_NODIRTY(inode, quota_bytes)) { | 2136 | if (DQUOT_ALLOC_SPACE_NODIRTY(inode, quota_bytes)) { |
2023 | pathrelse(p_s_path); | 2137 | pathrelse(p_s_path); |
2024 | return -EDQUOT; | 2138 | return -EDQUOT; |
2139 | } | ||
2025 | } | 2140 | } |
2026 | } | 2141 | init_tb_struct(th, &s_ins_balance, th->t_super, p_s_path, |
2027 | init_tb_struct(th, &s_ins_balance, th->t_super, p_s_path, IH_SIZE + ih_item_len(p_s_ih)); | 2142 | IH_SIZE + ih_item_len(p_s_ih)); |
2028 | #ifdef DISPLACE_NEW_PACKING_LOCALITIES | 2143 | #ifdef DISPLACE_NEW_PACKING_LOCALITIES |
2029 | s_ins_balance.key = key->on_disk_key; | 2144 | s_ins_balance.key = key->on_disk_key; |
2030 | #endif | 2145 | #endif |
2031 | /* DQUOT_* can schedule, must check to be sure calling fix_nodes is safe */ | 2146 | /* DQUOT_* can schedule, must check to be sure calling fix_nodes is safe */ |
2032 | if (inode && fs_changed(fs_gen, inode->i_sb)) { | 2147 | if (inode && fs_changed(fs_gen, inode->i_sb)) { |
2033 | goto search_again; | 2148 | goto search_again; |
2034 | } | ||
2035 | |||
2036 | while ( (retval = fix_nodes(M_INSERT, &s_ins_balance, p_s_ih, p_c_body)) == REPEAT_SEARCH) { | ||
2037 | search_again: | ||
2038 | /* file system changed while we were in the fix_nodes */ | ||
2039 | PROC_INFO_INC( th -> t_super, insert_item_restarted ); | ||
2040 | retval = search_item (th->t_super, key, p_s_path); | ||
2041 | if (retval == IO_ERROR) { | ||
2042 | retval = -EIO; | ||
2043 | goto error_out ; | ||
2044 | } | 2149 | } |
2045 | if (retval == ITEM_FOUND) { | 2150 | |
2046 | reiserfs_warning (th->t_super, "PAP-5760: reiserfs_insert_item: " | 2151 | while ((retval = |
2047 | "key %K already exists in the tree", key); | 2152 | fix_nodes(M_INSERT, &s_ins_balance, p_s_ih, |
2048 | retval = -EEXIST ; | 2153 | p_c_body)) == REPEAT_SEARCH) { |
2049 | goto error_out; | 2154 | search_again: |
2155 | /* file system changed while we were in the fix_nodes */ | ||
2156 | PROC_INFO_INC(th->t_super, insert_item_restarted); | ||
2157 | retval = search_item(th->t_super, key, p_s_path); | ||
2158 | if (retval == IO_ERROR) { | ||
2159 | retval = -EIO; | ||
2160 | goto error_out; | ||
2161 | } | ||
2162 | if (retval == ITEM_FOUND) { | ||
2163 | reiserfs_warning(th->t_super, | ||
2164 | "PAP-5760: reiserfs_insert_item: " | ||
2165 | "key %K already exists in the tree", | ||
2166 | key); | ||
2167 | retval = -EEXIST; | ||
2168 | goto error_out; | ||
2169 | } | ||
2050 | } | 2170 | } |
2051 | } | ||
2052 | 2171 | ||
2053 | /* make balancing after all resources will be collected at a time */ | 2172 | /* make balancing after all resources will be collected at a time */ |
2054 | if ( retval == CARRY_ON ) { | 2173 | if (retval == CARRY_ON) { |
2055 | do_balance (&s_ins_balance, p_s_ih, p_c_body, M_INSERT); | 2174 | do_balance(&s_ins_balance, p_s_ih, p_c_body, M_INSERT); |
2056 | return 0; | 2175 | return 0; |
2057 | } | 2176 | } |
2058 | 2177 | ||
2059 | retval = (retval == NO_DISK_SPACE) ? -ENOSPC : -EIO; | 2178 | retval = (retval == NO_DISK_SPACE) ? -ENOSPC : -EIO; |
2060 | error_out: | 2179 | error_out: |
2061 | /* also releases the path */ | 2180 | /* also releases the path */ |
2062 | unfix_nodes(&s_ins_balance); | 2181 | unfix_nodes(&s_ins_balance); |
2063 | #ifdef REISERQUOTA_DEBUG | 2182 | #ifdef REISERQUOTA_DEBUG |
2064 | reiserfs_debug (th->t_super, REISERFS_DEBUG_CODE, "reiserquota insert_item(): freeing %u id=%u type=%c", quota_bytes, inode->i_uid, head2type(p_s_ih)); | 2183 | reiserfs_debug(th->t_super, REISERFS_DEBUG_CODE, |
2184 | "reiserquota insert_item(): freeing %u id=%u type=%c", | ||
2185 | quota_bytes, inode->i_uid, head2type(p_s_ih)); | ||
2065 | #endif | 2186 | #endif |
2066 | if (inode) | 2187 | if (inode) |
2067 | DQUOT_FREE_SPACE_NODIRTY(inode, quota_bytes) ; | 2188 | DQUOT_FREE_SPACE_NODIRTY(inode, quota_bytes); |
2068 | return retval; | 2189 | return retval; |
2069 | } | 2190 | } |
2070 | |||
2071 | |||
2072 | |||
2073 | |||