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Diffstat (limited to 'fs/xfs/xfs_iomap.c')
-rw-r--r--fs/xfs/xfs_iomap.c123
1 files changed, 39 insertions, 84 deletions
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index 0b65039951a0..ef14943829da 100644
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -55,71 +55,33 @@
55#define XFS_STRAT_WRITE_IMAPS 2 55#define XFS_STRAT_WRITE_IMAPS 2
56#define XFS_WRITE_IMAPS XFS_BMAP_MAX_NMAP 56#define XFS_WRITE_IMAPS XFS_BMAP_MAX_NMAP
57 57
58STATIC int 58STATIC int xfs_iomap_write_direct(struct xfs_inode *, xfs_off_t, size_t,
59xfs_imap_to_bmap( 59 int, struct xfs_bmbt_irec *, int *);
60 xfs_inode_t *ip, 60STATIC int xfs_iomap_write_delay(struct xfs_inode *, xfs_off_t, size_t, int,
61 xfs_off_t offset, 61 struct xfs_bmbt_irec *, int *);
62 xfs_bmbt_irec_t *imap, 62STATIC int xfs_iomap_write_allocate(struct xfs_inode *, xfs_off_t, size_t,
63 xfs_iomap_t *iomapp, 63 struct xfs_bmbt_irec *, int *);
64 int imaps, /* Number of imap entries */
65 int iomaps, /* Number of iomap entries */
66 int flags)
67{
68 xfs_mount_t *mp = ip->i_mount;
69 int pbm;
70 xfs_fsblock_t start_block;
71
72
73 for (pbm = 0; imaps && pbm < iomaps; imaps--, iomapp++, imap++, pbm++) {
74 iomapp->iomap_offset = XFS_FSB_TO_B(mp, imap->br_startoff);
75 iomapp->iomap_delta = offset - iomapp->iomap_offset;
76 iomapp->iomap_bsize = XFS_FSB_TO_B(mp, imap->br_blockcount);
77 iomapp->iomap_flags = flags;
78
79 if (XFS_IS_REALTIME_INODE(ip)) {
80 iomapp->iomap_flags |= IOMAP_REALTIME;
81 iomapp->iomap_target = mp->m_rtdev_targp;
82 } else {
83 iomapp->iomap_target = mp->m_ddev_targp;
84 }
85 start_block = imap->br_startblock;
86 if (start_block == HOLESTARTBLOCK) {
87 iomapp->iomap_bn = IOMAP_DADDR_NULL;
88 iomapp->iomap_flags |= IOMAP_HOLE;
89 } else if (start_block == DELAYSTARTBLOCK) {
90 iomapp->iomap_bn = IOMAP_DADDR_NULL;
91 iomapp->iomap_flags |= IOMAP_DELAY;
92 } else {
93 iomapp->iomap_bn = xfs_fsb_to_db(ip, start_block);
94 if (ISUNWRITTEN(imap))
95 iomapp->iomap_flags |= IOMAP_UNWRITTEN;
96 }
97
98 offset += iomapp->iomap_bsize - iomapp->iomap_delta;
99 }
100 return pbm; /* Return the number filled */
101}
102 64
103int 65int
104xfs_iomap( 66xfs_iomap(
105 xfs_inode_t *ip, 67 struct xfs_inode *ip,
106 xfs_off_t offset, 68 xfs_off_t offset,
107 ssize_t count, 69 ssize_t count,
108 int flags, 70 int flags,
109 xfs_iomap_t *iomapp, 71 struct xfs_bmbt_irec *imap,
110 int *niomaps) 72 int *nimaps,
73 int *new)
111{ 74{
112 xfs_mount_t *mp = ip->i_mount; 75 struct xfs_mount *mp = ip->i_mount;
113 xfs_fileoff_t offset_fsb, end_fsb; 76 xfs_fileoff_t offset_fsb, end_fsb;
114 int error = 0; 77 int error = 0;
115 int lockmode = 0; 78 int lockmode = 0;
116 xfs_bmbt_irec_t imap; 79 int bmapi_flags = 0;
117 int nimaps = 1;
118 int bmapi_flags = 0;
119 int iomap_flags = 0;
120 80
121 ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFREG); 81 ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFREG);
122 82
83 *new = 0;
84
123 if (XFS_FORCED_SHUTDOWN(mp)) 85 if (XFS_FORCED_SHUTDOWN(mp))
124 return XFS_ERROR(EIO); 86 return XFS_ERROR(EIO);
125 87
@@ -160,8 +122,8 @@ xfs_iomap(
160 122
161 error = xfs_bmapi(NULL, ip, offset_fsb, 123 error = xfs_bmapi(NULL, ip, offset_fsb,
162 (xfs_filblks_t)(end_fsb - offset_fsb), 124 (xfs_filblks_t)(end_fsb - offset_fsb),
163 bmapi_flags, NULL, 0, &imap, 125 bmapi_flags, NULL, 0, imap,
164 &nimaps, NULL, NULL); 126 nimaps, NULL, NULL);
165 127
166 if (error) 128 if (error)
167 goto out; 129 goto out;
@@ -169,46 +131,41 @@ xfs_iomap(
169 switch (flags & (BMAPI_WRITE|BMAPI_ALLOCATE)) { 131 switch (flags & (BMAPI_WRITE|BMAPI_ALLOCATE)) {
170 case BMAPI_WRITE: 132 case BMAPI_WRITE:
171 /* If we found an extent, return it */ 133 /* If we found an extent, return it */
172 if (nimaps && 134 if (*nimaps &&
173 (imap.br_startblock != HOLESTARTBLOCK) && 135 (imap->br_startblock != HOLESTARTBLOCK) &&
174 (imap.br_startblock != DELAYSTARTBLOCK)) { 136 (imap->br_startblock != DELAYSTARTBLOCK)) {
175 trace_xfs_iomap_found(ip, offset, count, flags, &imap); 137 trace_xfs_iomap_found(ip, offset, count, flags, imap);
176 break; 138 break;
177 } 139 }
178 140
179 if (flags & (BMAPI_DIRECT|BMAPI_MMAP)) { 141 if (flags & (BMAPI_DIRECT|BMAPI_MMAP)) {
180 error = xfs_iomap_write_direct(ip, offset, count, flags, 142 error = xfs_iomap_write_direct(ip, offset, count, flags,
181 &imap, &nimaps, nimaps); 143 imap, nimaps);
182 } else { 144 } else {
183 error = xfs_iomap_write_delay(ip, offset, count, flags, 145 error = xfs_iomap_write_delay(ip, offset, count, flags,
184 &imap, &nimaps); 146 imap, nimaps);
185 } 147 }
186 if (!error) { 148 if (!error) {
187 trace_xfs_iomap_alloc(ip, offset, count, flags, &imap); 149 trace_xfs_iomap_alloc(ip, offset, count, flags, imap);
188 } 150 }
189 iomap_flags = IOMAP_NEW; 151 *new = 1;
190 break; 152 break;
191 case BMAPI_ALLOCATE: 153 case BMAPI_ALLOCATE:
192 /* If we found an extent, return it */ 154 /* If we found an extent, return it */
193 xfs_iunlock(ip, lockmode); 155 xfs_iunlock(ip, lockmode);
194 lockmode = 0; 156 lockmode = 0;
195 157
196 if (nimaps && !isnullstartblock(imap.br_startblock)) { 158 if (*nimaps && !isnullstartblock(imap->br_startblock)) {
197 trace_xfs_iomap_found(ip, offset, count, flags, &imap); 159 trace_xfs_iomap_found(ip, offset, count, flags, imap);
198 break; 160 break;
199 } 161 }
200 162
201 error = xfs_iomap_write_allocate(ip, offset, count, 163 error = xfs_iomap_write_allocate(ip, offset, count,
202 &imap, &nimaps); 164 imap, nimaps);
203 break; 165 break;
204 } 166 }
205 167
206 if (nimaps) { 168 ASSERT(*nimaps <= 1);
207 *niomaps = xfs_imap_to_bmap(ip, offset, &imap,
208 iomapp, nimaps, *niomaps, iomap_flags);
209 } else if (niomaps) {
210 *niomaps = 0;
211 }
212 169
213out: 170out:
214 if (lockmode) 171 if (lockmode)
@@ -216,7 +173,6 @@ out:
216 return XFS_ERROR(error); 173 return XFS_ERROR(error);
217} 174}
218 175
219
220STATIC int 176STATIC int
221xfs_iomap_eof_align_last_fsb( 177xfs_iomap_eof_align_last_fsb(
222 xfs_mount_t *mp, 178 xfs_mount_t *mp,
@@ -285,15 +241,14 @@ xfs_cmn_err_fsblock_zero(
285 return EFSCORRUPTED; 241 return EFSCORRUPTED;
286} 242}
287 243
288int 244STATIC int
289xfs_iomap_write_direct( 245xfs_iomap_write_direct(
290 xfs_inode_t *ip, 246 xfs_inode_t *ip,
291 xfs_off_t offset, 247 xfs_off_t offset,
292 size_t count, 248 size_t count,
293 int flags, 249 int flags,
294 xfs_bmbt_irec_t *ret_imap, 250 xfs_bmbt_irec_t *ret_imap,
295 int *nmaps, 251 int *nmaps)
296 int found)
297{ 252{
298 xfs_mount_t *mp = ip->i_mount; 253 xfs_mount_t *mp = ip->i_mount;
299 xfs_fileoff_t offset_fsb; 254 xfs_fileoff_t offset_fsb;
@@ -330,7 +285,7 @@ xfs_iomap_write_direct(
330 if (error) 285 if (error)
331 goto error_out; 286 goto error_out;
332 } else { 287 } else {
333 if (found && (ret_imap->br_startblock == HOLESTARTBLOCK)) 288 if (*nmaps && (ret_imap->br_startblock == HOLESTARTBLOCK))
334 last_fsb = MIN(last_fsb, (xfs_fileoff_t) 289 last_fsb = MIN(last_fsb, (xfs_fileoff_t)
335 ret_imap->br_blockcount + 290 ret_imap->br_blockcount +
336 ret_imap->br_startoff); 291 ret_imap->br_startoff);
@@ -485,7 +440,7 @@ xfs_iomap_eof_want_preallocate(
485 return 0; 440 return 0;
486} 441}
487 442
488int 443STATIC int
489xfs_iomap_write_delay( 444xfs_iomap_write_delay(
490 xfs_inode_t *ip, 445 xfs_inode_t *ip,
491 xfs_off_t offset, 446 xfs_off_t offset,
@@ -588,7 +543,7 @@ retry:
588 * We no longer bother to look at the incoming map - all we have to 543 * We no longer bother to look at the incoming map - all we have to
589 * guarantee is that whatever we allocate fills the required range. 544 * guarantee is that whatever we allocate fills the required range.
590 */ 545 */
591int 546STATIC int
592xfs_iomap_write_allocate( 547xfs_iomap_write_allocate(
593 xfs_inode_t *ip, 548 xfs_inode_t *ip,
594 xfs_off_t offset, 549 xfs_off_t offset,
generated by cgit v1.2.2 (git 2.25.0) at 2025-03-05 19:31:57 -0500