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authorLinus Torvalds <torvalds@g5.osdl.org>2005-07-12 23:21:28 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2005-07-12 23:21:28 -0400
commitbd4c625c061c2a38568d0add3478f59172455159 (patch)
tree1c44a17c55bce2ee7ad5ea3d15a208ecc0955f74 /fs/reiserfs/tail_conversion.c
parent7fa94c8868edfef8cb6a201fcc9a5078b7b961da (diff)
reiserfs: run scripts/Lindent on reiserfs code
This was a pure indentation change, using: scripts/Lindent fs/reiserfs/*.c include/linux/reiserfs_*.h to make reiserfs match the regular Linux indentation style. As Jeff Mahoney <jeffm@suse.com> writes: The ReiserFS code is a mix of a number of different coding styles, sometimes different even from line-to-line. Since the code has been relatively stable for quite some time and there are few outstanding patches to be applied, it is time to reformat the code to conform to the Linux style standard outlined in Documentation/CodingStyle. This patch contains the result of running scripts/Lindent against fs/reiserfs/*.c and include/linux/reiserfs_*.h. There are places where the code can be made to look better, but I'd rather keep those patches separate so that there isn't a subtle by-hand hand accident in the middle of a huge patch. To be clear: This patch is reformatting *only*. A number of patches may follow that continue to make the code more consistent with the Linux coding style. Hans wasn't particularly enthusiastic about these patches, but said he wouldn't really oppose them either. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/reiserfs/tail_conversion.c')
-rw-r--r--fs/reiserfs/tail_conversion.c463
1 files changed, 233 insertions, 230 deletions
diff --git a/fs/reiserfs/tail_conversion.c b/fs/reiserfs/tail_conversion.c
index 6191909d5165..c92e124f628e 100644
--- a/fs/reiserfs/tail_conversion.c
+++ b/fs/reiserfs/tail_conversion.c
@@ -11,156 +11,159 @@
11/* access to tail : when one is going to read tail it must make sure, that is not running. 11/* access to tail : when one is going to read tail it must make sure, that is not running.
12 direct2indirect and indirect2direct can not run concurrently */ 12 direct2indirect and indirect2direct can not run concurrently */
13 13
14
15/* Converts direct items to an unformatted node. Panics if file has no 14/* Converts direct items to an unformatted node. Panics if file has no
16 tail. -ENOSPC if no disk space for conversion */ 15 tail. -ENOSPC if no disk space for conversion */
17/* path points to first direct item of the file regarless of how many of 16/* path points to first direct item of the file regarless of how many of
18 them are there */ 17 them are there */
19int direct2indirect (struct reiserfs_transaction_handle *th, struct inode * inode, 18int direct2indirect(struct reiserfs_transaction_handle *th, struct inode *inode,
20 struct path * path, struct buffer_head * unbh, 19 struct path *path, struct buffer_head *unbh,
21 loff_t tail_offset) 20 loff_t tail_offset)
22{ 21{
23 struct super_block * sb = inode->i_sb; 22 struct super_block *sb = inode->i_sb;
24 struct buffer_head *up_to_date_bh ; 23 struct buffer_head *up_to_date_bh;
25 struct item_head * p_le_ih = PATH_PITEM_HEAD (path); 24 struct item_head *p_le_ih = PATH_PITEM_HEAD(path);
26 unsigned long total_tail = 0 ; 25 unsigned long total_tail = 0;
27 struct cpu_key end_key; /* Key to search for the last byte of the 26 struct cpu_key end_key; /* Key to search for the last byte of the
28 converted item. */ 27 converted item. */
29 struct item_head ind_ih; /* new indirect item to be inserted or 28 struct item_head ind_ih; /* new indirect item to be inserted or
30 key of unfm pointer to be pasted */ 29 key of unfm pointer to be pasted */
31 int n_blk_size, 30 int n_blk_size, n_retval; /* returned value for reiserfs_insert_item and clones */
32 n_retval; /* returned value for reiserfs_insert_item and clones */ 31 unp_t unfm_ptr; /* Handle on an unformatted node
33 unp_t unfm_ptr; /* Handle on an unformatted node 32 that will be inserted in the
34 that will be inserted in the 33 tree. */
35 tree. */ 34
36 35 BUG_ON(!th->t_trans_id);
37 BUG_ON (!th->t_trans_id); 36
38 37 REISERFS_SB(sb)->s_direct2indirect++;
39 REISERFS_SB(sb)->s_direct2indirect ++; 38
40 39 n_blk_size = sb->s_blocksize;
41 n_blk_size = sb->s_blocksize; 40
42 41 /* and key to search for append or insert pointer to the new
43 /* and key to search for append or insert pointer to the new 42 unformatted node. */
44 unformatted node. */ 43 copy_item_head(&ind_ih, p_le_ih);
45 copy_item_head (&ind_ih, p_le_ih); 44 set_le_ih_k_offset(&ind_ih, tail_offset);
46 set_le_ih_k_offset (&ind_ih, tail_offset); 45 set_le_ih_k_type(&ind_ih, TYPE_INDIRECT);
47 set_le_ih_k_type (&ind_ih, TYPE_INDIRECT); 46
48 47 /* Set the key to search for the place for new unfm pointer */
49 /* Set the key to search for the place for new unfm pointer */ 48 make_cpu_key(&end_key, inode, tail_offset, TYPE_INDIRECT, 4);
50 make_cpu_key (&end_key, inode, tail_offset, TYPE_INDIRECT, 4); 49
51 50 // FIXME: we could avoid this
52 // FIXME: we could avoid this 51 if (search_for_position_by_key(sb, &end_key, path) == POSITION_FOUND) {
53 if ( search_for_position_by_key (sb, &end_key, path) == POSITION_FOUND ) { 52 reiserfs_warning(sb, "PAP-14030: direct2indirect: "
54 reiserfs_warning (sb, "PAP-14030: direct2indirect: " 53 "pasted or inserted byte exists in the tree %K. "
55 "pasted or inserted byte exists in the tree %K. " 54 "Use fsck to repair.", &end_key);
56 "Use fsck to repair.", &end_key); 55 pathrelse(path);
57 pathrelse(path); 56 return -EIO;
58 return -EIO; 57 }
59 } 58
60 59 p_le_ih = PATH_PITEM_HEAD(path);
61 p_le_ih = PATH_PITEM_HEAD (path); 60
62 61 unfm_ptr = cpu_to_le32(unbh->b_blocknr);
63 unfm_ptr = cpu_to_le32 (unbh->b_blocknr); 62
64 63 if (is_statdata_le_ih(p_le_ih)) {
65 if ( is_statdata_le_ih (p_le_ih) ) { 64 /* Insert new indirect item. */
66 /* Insert new indirect item. */ 65 set_ih_free_space(&ind_ih, 0); /* delete at nearest future */
67 set_ih_free_space (&ind_ih, 0); /* delete at nearest future */ 66 put_ih_item_len(&ind_ih, UNFM_P_SIZE);
68 put_ih_item_len( &ind_ih, UNFM_P_SIZE ); 67 PATH_LAST_POSITION(path)++;
69 PATH_LAST_POSITION (path)++; 68 n_retval =
70 n_retval = reiserfs_insert_item (th, path, &end_key, &ind_ih, inode, 69 reiserfs_insert_item(th, path, &end_key, &ind_ih, inode,
71 (char *)&unfm_ptr); 70 (char *)&unfm_ptr);
72 } else {
73 /* Paste into last indirect item of an object. */
74 n_retval = reiserfs_paste_into_item(th, path, &end_key, inode,
75 (char *)&unfm_ptr, UNFM_P_SIZE);
76 }
77 if ( n_retval ) {
78 return n_retval;
79 }
80
81 // note: from here there are two keys which have matching first
82 // three key components. They only differ by the fourth one.
83
84
85 /* Set the key to search for the direct items of the file */
86 make_cpu_key (&end_key, inode, max_reiserfs_offset (inode), TYPE_DIRECT, 4);
87
88 /* Move bytes from the direct items to the new unformatted node
89 and delete them. */
90 while (1) {
91 int tail_size;
92
93 /* end_key.k_offset is set so, that we will always have found
94 last item of the file */
95 if ( search_for_position_by_key (sb, &end_key, path) == POSITION_FOUND )
96 reiserfs_panic (sb, "PAP-14050: direct2indirect: "
97 "direct item (%K) not found", &end_key);
98 p_le_ih = PATH_PITEM_HEAD (path);
99 RFALSE( !is_direct_le_ih (p_le_ih),
100 "vs-14055: direct item expected(%K), found %h",
101 &end_key, p_le_ih);
102 tail_size = (le_ih_k_offset (p_le_ih) & (n_blk_size - 1))
103 + ih_item_len(p_le_ih) - 1;
104
105 /* we only send the unbh pointer if the buffer is not up to date.
106 ** this avoids overwriting good data from writepage() with old data
107 ** from the disk or buffer cache
108 ** Special case: unbh->b_page will be NULL if we are coming through
109 ** DIRECT_IO handler here.
110 */
111 if (!unbh->b_page || buffer_uptodate(unbh) || PageUptodate(unbh->b_page)) {
112 up_to_date_bh = NULL ;
113 } else { 71 } else {
114 up_to_date_bh = unbh ; 72 /* Paste into last indirect item of an object. */
73 n_retval = reiserfs_paste_into_item(th, path, &end_key, inode,
74 (char *)&unfm_ptr,
75 UNFM_P_SIZE);
115 } 76 }
116 n_retval = reiserfs_delete_item (th, path, &end_key, inode, 77 if (n_retval) {
117 up_to_date_bh) ; 78 return n_retval;
118 79 }
119 total_tail += n_retval ; 80 // note: from here there are two keys which have matching first
120 if (tail_size == n_retval) 81 // three key components. They only differ by the fourth one.
121 // done: file does not have direct items anymore 82
122 break; 83 /* Set the key to search for the direct items of the file */
123 84 make_cpu_key(&end_key, inode, max_reiserfs_offset(inode), TYPE_DIRECT,
124 } 85 4);
125 /* if we've copied bytes from disk into the page, we need to zero 86
126 ** out the unused part of the block (it was not up to date before) 87 /* Move bytes from the direct items to the new unformatted node
127 */ 88 and delete them. */
128 if (up_to_date_bh) { 89 while (1) {
129 unsigned pgoff = (tail_offset + total_tail - 1) & (PAGE_CACHE_SIZE - 1); 90 int tail_size;
130 char *kaddr=kmap_atomic(up_to_date_bh->b_page, KM_USER0); 91
131 memset(kaddr + pgoff, 0, n_blk_size - total_tail) ; 92 /* end_key.k_offset is set so, that we will always have found
132 kunmap_atomic(kaddr, KM_USER0); 93 last item of the file */
133 } 94 if (search_for_position_by_key(sb, &end_key, path) ==
134 95 POSITION_FOUND)
135 REISERFS_I(inode)->i_first_direct_byte = U32_MAX; 96 reiserfs_panic(sb,
136 97 "PAP-14050: direct2indirect: "
137 return 0; 98 "direct item (%K) not found", &end_key);
138} 99 p_le_ih = PATH_PITEM_HEAD(path);
100 RFALSE(!is_direct_le_ih(p_le_ih),
101 "vs-14055: direct item expected(%K), found %h",
102 &end_key, p_le_ih);
103 tail_size = (le_ih_k_offset(p_le_ih) & (n_blk_size - 1))
104 + ih_item_len(p_le_ih) - 1;
105
106 /* we only send the unbh pointer if the buffer is not up to date.
107 ** this avoids overwriting good data from writepage() with old data
108 ** from the disk or buffer cache
109 ** Special case: unbh->b_page will be NULL if we are coming through
110 ** DIRECT_IO handler here.
111 */
112 if (!unbh->b_page || buffer_uptodate(unbh)
113 || PageUptodate(unbh->b_page)) {
114 up_to_date_bh = NULL;
115 } else {
116 up_to_date_bh = unbh;
117 }
118 n_retval = reiserfs_delete_item(th, path, &end_key, inode,
119 up_to_date_bh);
120
121 total_tail += n_retval;
122 if (tail_size == n_retval)
123 // done: file does not have direct items anymore
124 break;
139 125
126 }
127 /* if we've copied bytes from disk into the page, we need to zero
128 ** out the unused part of the block (it was not up to date before)
129 */
130 if (up_to_date_bh) {
131 unsigned pgoff =
132 (tail_offset + total_tail - 1) & (PAGE_CACHE_SIZE - 1);
133 char *kaddr = kmap_atomic(up_to_date_bh->b_page, KM_USER0);
134 memset(kaddr + pgoff, 0, n_blk_size - total_tail);
135 kunmap_atomic(kaddr, KM_USER0);
136 }
137
138 REISERFS_I(inode)->i_first_direct_byte = U32_MAX;
139
140 return 0;
141}
140 142
141/* stolen from fs/buffer.c */ 143/* stolen from fs/buffer.c */
142void reiserfs_unmap_buffer(struct buffer_head *bh) { 144void reiserfs_unmap_buffer(struct buffer_head *bh)
143 lock_buffer(bh) ; 145{
144 if (buffer_journaled(bh) || buffer_journal_dirty(bh)) { 146 lock_buffer(bh);
145 BUG() ; 147 if (buffer_journaled(bh) || buffer_journal_dirty(bh)) {
146 } 148 BUG();
147 clear_buffer_dirty(bh) ; 149 }
148 /* Remove the buffer from whatever list it belongs to. We are mostly 150 clear_buffer_dirty(bh);
149 interested in removing it from per-sb j_dirty_buffers list, to avoid 151 /* Remove the buffer from whatever list it belongs to. We are mostly
150 BUG() on attempt to write not mapped buffer */ 152 interested in removing it from per-sb j_dirty_buffers list, to avoid
151 if ( (!list_empty(&bh->b_assoc_buffers) || bh->b_private) && bh->b_page) { 153 BUG() on attempt to write not mapped buffer */
152 struct inode *inode = bh->b_page->mapping->host; 154 if ((!list_empty(&bh->b_assoc_buffers) || bh->b_private) && bh->b_page) {
153 struct reiserfs_journal *j = SB_JOURNAL(inode->i_sb); 155 struct inode *inode = bh->b_page->mapping->host;
154 spin_lock(&j->j_dirty_buffers_lock); 156 struct reiserfs_journal *j = SB_JOURNAL(inode->i_sb);
155 list_del_init(&bh->b_assoc_buffers); 157 spin_lock(&j->j_dirty_buffers_lock);
156 reiserfs_free_jh(bh); 158 list_del_init(&bh->b_assoc_buffers);
157 spin_unlock(&j->j_dirty_buffers_lock); 159 reiserfs_free_jh(bh);
158 } 160 spin_unlock(&j->j_dirty_buffers_lock);
159 clear_buffer_mapped(bh) ; 161 }
160 clear_buffer_req(bh) ; 162 clear_buffer_mapped(bh);
161 clear_buffer_new(bh); 163 clear_buffer_req(bh);
162 bh->b_bdev = NULL; 164 clear_buffer_new(bh);
163 unlock_buffer(bh) ; 165 bh->b_bdev = NULL;
166 unlock_buffer(bh);
164} 167}
165 168
166/* this first locks inode (neither reads nor sync are permitted), 169/* this first locks inode (neither reads nor sync are permitted),
@@ -169,108 +172,108 @@ void reiserfs_unmap_buffer(struct buffer_head *bh) {
169 what we expect from it (number of cut bytes). But when tail remains 172 what we expect from it (number of cut bytes). But when tail remains
170 in the unformatted node, we set mode to SKIP_BALANCING and unlock 173 in the unformatted node, we set mode to SKIP_BALANCING and unlock
171 inode */ 174 inode */
172int indirect2direct (struct reiserfs_transaction_handle *th, 175int indirect2direct(struct reiserfs_transaction_handle *th, struct inode *p_s_inode, struct page *page, struct path *p_s_path, /* path to the indirect item. */
173 struct inode * p_s_inode, 176 const struct cpu_key *p_s_item_key, /* Key to look for unformatted node pointer to be cut. */
174 struct page *page, 177 loff_t n_new_file_size, /* New file size. */
175 struct path * p_s_path, /* path to the indirect item. */ 178 char *p_c_mode)
176 const struct cpu_key * p_s_item_key, /* Key to look for unformatted node pointer to be cut. */
177 loff_t n_new_file_size, /* New file size. */
178 char * p_c_mode)
179{ 179{
180 struct super_block * p_s_sb = p_s_inode->i_sb; 180 struct super_block *p_s_sb = p_s_inode->i_sb;
181 struct item_head s_ih; 181 struct item_head s_ih;
182 unsigned long n_block_size = p_s_sb->s_blocksize; 182 unsigned long n_block_size = p_s_sb->s_blocksize;
183 char * tail; 183 char *tail;
184 int tail_len, round_tail_len; 184 int tail_len, round_tail_len;
185 loff_t pos, pos1; /* position of first byte of the tail */ 185 loff_t pos, pos1; /* position of first byte of the tail */
186 struct cpu_key key; 186 struct cpu_key key;
187 187
188 BUG_ON (!th->t_trans_id); 188 BUG_ON(!th->t_trans_id);
189 189
190 REISERFS_SB(p_s_sb)->s_indirect2direct ++; 190 REISERFS_SB(p_s_sb)->s_indirect2direct++;
191 191
192 *p_c_mode = M_SKIP_BALANCING; 192 *p_c_mode = M_SKIP_BALANCING;
193 193
194 /* store item head path points to. */ 194 /* store item head path points to. */
195 copy_item_head (&s_ih, PATH_PITEM_HEAD(p_s_path));
196
197 tail_len = (n_new_file_size & (n_block_size - 1));
198 if (get_inode_sd_version (p_s_inode) == STAT_DATA_V2)
199 round_tail_len = ROUND_UP (tail_len);
200 else
201 round_tail_len = tail_len;
202
203 pos = le_ih_k_offset (&s_ih) - 1 + (ih_item_len(&s_ih) / UNFM_P_SIZE - 1) * p_s_sb->s_blocksize;
204 pos1 = pos;
205
206 // we are protected by i_sem. The tail can not disapper, not
207 // append can be done either
208 // we are in truncate or packing tail in file_release
209
210 tail = (char *)kmap(page) ; /* this can schedule */
211
212 if (path_changed (&s_ih, p_s_path)) {
213 /* re-search indirect item */
214 if ( search_for_position_by_key (p_s_sb, p_s_item_key, p_s_path) == POSITION_NOT_FOUND )
215 reiserfs_panic(p_s_sb, "PAP-5520: indirect2direct: "
216 "item to be converted %K does not exist", p_s_item_key);
217 copy_item_head(&s_ih, PATH_PITEM_HEAD(p_s_path)); 195 copy_item_head(&s_ih, PATH_PITEM_HEAD(p_s_path));
196
197 tail_len = (n_new_file_size & (n_block_size - 1));
198 if (get_inode_sd_version(p_s_inode) == STAT_DATA_V2)
199 round_tail_len = ROUND_UP(tail_len);
200 else
201 round_tail_len = tail_len;
202
203 pos =
204 le_ih_k_offset(&s_ih) - 1 + (ih_item_len(&s_ih) / UNFM_P_SIZE -
205 1) * p_s_sb->s_blocksize;
206 pos1 = pos;
207
208 // we are protected by i_sem. The tail can not disapper, not
209 // append can be done either
210 // we are in truncate or packing tail in file_release
211
212 tail = (char *)kmap(page); /* this can schedule */
213
214 if (path_changed(&s_ih, p_s_path)) {
215 /* re-search indirect item */
216 if (search_for_position_by_key(p_s_sb, p_s_item_key, p_s_path)
217 == POSITION_NOT_FOUND)
218 reiserfs_panic(p_s_sb,
219 "PAP-5520: indirect2direct: "
220 "item to be converted %K does not exist",
221 p_s_item_key);
222 copy_item_head(&s_ih, PATH_PITEM_HEAD(p_s_path));
218#ifdef CONFIG_REISERFS_CHECK 223#ifdef CONFIG_REISERFS_CHECK
219 pos = le_ih_k_offset (&s_ih) - 1 + 224 pos = le_ih_k_offset(&s_ih) - 1 +
220 (ih_item_len(&s_ih) / UNFM_P_SIZE - 1) * p_s_sb->s_blocksize; 225 (ih_item_len(&s_ih) / UNFM_P_SIZE -
221 if (pos != pos1) 226 1) * p_s_sb->s_blocksize;
222 reiserfs_panic (p_s_sb, "vs-5530: indirect2direct: " 227 if (pos != pos1)
223 "tail position changed while we were reading it"); 228 reiserfs_panic(p_s_sb, "vs-5530: indirect2direct: "
229 "tail position changed while we were reading it");
224#endif 230#endif
225 } 231 }
226
227
228 /* Set direct item header to insert. */
229 make_le_item_head (&s_ih, NULL, get_inode_item_key_version (p_s_inode), pos1 + 1,
230 TYPE_DIRECT, round_tail_len, 0xffff/*ih_free_space*/);
231
232 /* we want a pointer to the first byte of the tail in the page.
233 ** the page was locked and this part of the page was up to date when
234 ** indirect2direct was called, so we know the bytes are still valid
235 */
236 tail = tail + (pos & (PAGE_CACHE_SIZE - 1)) ;
237
238 PATH_LAST_POSITION(p_s_path)++;
239
240 key = *p_s_item_key;
241 set_cpu_key_k_type (&key, TYPE_DIRECT);
242 key.key_length = 4;
243 /* Insert tail as new direct item in the tree */
244 if ( reiserfs_insert_item(th, p_s_path, &key, &s_ih, p_s_inode,
245 tail ? tail : NULL) < 0 ) {
246 /* No disk memory. So we can not convert last unformatted node
247 to the direct item. In this case we used to adjust
248 indirect items's ih_free_space. Now ih_free_space is not
249 used, it would be ideal to write zeros to corresponding
250 unformatted node. For now i_size is considered as guard for
251 going out of file size */
252 kunmap(page) ;
253 return n_block_size - round_tail_len;
254 }
255 kunmap(page) ;
256
257 /* make sure to get the i_blocks changes from reiserfs_insert_item */
258 reiserfs_update_sd(th, p_s_inode);
259 232
260 // note: we have now the same as in above direct2indirect 233 /* Set direct item header to insert. */
261 // conversion: there are two keys which have matching first three 234 make_le_item_head(&s_ih, NULL, get_inode_item_key_version(p_s_inode),
262 // key components. They only differ by the fouhth one. 235 pos1 + 1, TYPE_DIRECT, round_tail_len,
236 0xffff /*ih_free_space */ );
237
238 /* we want a pointer to the first byte of the tail in the page.
239 ** the page was locked and this part of the page was up to date when
240 ** indirect2direct was called, so we know the bytes are still valid
241 */
242 tail = tail + (pos & (PAGE_CACHE_SIZE - 1));
243
244 PATH_LAST_POSITION(p_s_path)++;
245
246 key = *p_s_item_key;
247 set_cpu_key_k_type(&key, TYPE_DIRECT);
248 key.key_length = 4;
249 /* Insert tail as new direct item in the tree */
250 if (reiserfs_insert_item(th, p_s_path, &key, &s_ih, p_s_inode,
251 tail ? tail : NULL) < 0) {
252 /* No disk memory. So we can not convert last unformatted node
253 to the direct item. In this case we used to adjust
254 indirect items's ih_free_space. Now ih_free_space is not
255 used, it would be ideal to write zeros to corresponding
256 unformatted node. For now i_size is considered as guard for
257 going out of file size */
258 kunmap(page);
259 return n_block_size - round_tail_len;
260 }
261 kunmap(page);
263 262
264 /* We have inserted new direct item and must remove last 263 /* make sure to get the i_blocks changes from reiserfs_insert_item */
265 unformatted node. */ 264 reiserfs_update_sd(th, p_s_inode);
266 *p_c_mode = M_CUT;
267 265
268 /* we store position of first direct item in the in-core inode */ 266 // note: we have now the same as in above direct2indirect
269 //mark_file_with_tail (p_s_inode, pos1 + 1); 267 // conversion: there are two keys which have matching first three
270 REISERFS_I(p_s_inode)->i_first_direct_byte = pos1 + 1; 268 // key components. They only differ by the fouhth one.
271
272 return n_block_size - round_tail_len;
273}
274 269
270 /* We have inserted new direct item and must remove last
271 unformatted node. */
272 *p_c_mode = M_CUT;
275 273
274 /* we store position of first direct item in the in-core inode */
275 //mark_file_with_tail (p_s_inode, pos1 + 1);
276 REISERFS_I(p_s_inode)->i_first_direct_byte = pos1 + 1;
276 277
278 return n_block_size - round_tail_len;
279}
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-16 19:01:34 -0500