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Diffstat (limited to 'fs/xfs/xfs_ialloc.c')
-rw-r--r--fs/xfs/xfs_ialloc.c449
1 files changed, 272 insertions, 177 deletions
diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c
index aad8c5da38a..e6ebbaeb4dc 100644
--- a/fs/xfs/xfs_ialloc.c
+++ b/fs/xfs/xfs_ialloc.c
@@ -41,68 +41,6 @@
#include "xfs_error.h"
#include "xfs_bmap.h"
-/*
- * Log specified fields for the inode given by bp and off.
- */
-STATIC void
-xfs_ialloc_log_di(
- xfs_trans_t *tp, /* transaction pointer */
- xfs_buf_t *bp, /* inode buffer */
- int off, /* index of inode in buffer */
- int fields) /* bitmask of fields to log */
-{
- int first; /* first byte number */
- int ioffset; /* off in bytes */
- int last; /* last byte number */
- xfs_mount_t *mp; /* mount point structure */
- static const short offsets[] = { /* field offsets */
- /* keep in sync with bits */
- offsetof(xfs_dinode_core_t, di_magic),
- offsetof(xfs_dinode_core_t, di_mode),
- offsetof(xfs_dinode_core_t, di_version),
- offsetof(xfs_dinode_core_t, di_format),
- offsetof(xfs_dinode_core_t, di_onlink),
- offsetof(xfs_dinode_core_t, di_uid),
- offsetof(xfs_dinode_core_t, di_gid),
- offsetof(xfs_dinode_core_t, di_nlink),
- offsetof(xfs_dinode_core_t, di_projid),
- offsetof(xfs_dinode_core_t, di_pad),
- offsetof(xfs_dinode_core_t, di_atime),
- offsetof(xfs_dinode_core_t, di_mtime),
- offsetof(xfs_dinode_core_t, di_ctime),
- offsetof(xfs_dinode_core_t, di_size),
- offsetof(xfs_dinode_core_t, di_nblocks),
- offsetof(xfs_dinode_core_t, di_extsize),
- offsetof(xfs_dinode_core_t, di_nextents),
- offsetof(xfs_dinode_core_t, di_anextents),
- offsetof(xfs_dinode_core_t, di_forkoff),
- offsetof(xfs_dinode_core_t, di_aformat),
- offsetof(xfs_dinode_core_t, di_dmevmask),
- offsetof(xfs_dinode_core_t, di_dmstate),
- offsetof(xfs_dinode_core_t, di_flags),
- offsetof(xfs_dinode_core_t, di_gen),
- offsetof(xfs_dinode_t, di_next_unlinked),
- offsetof(xfs_dinode_t, di_u),
- offsetof(xfs_dinode_t, di_a),
- sizeof(xfs_dinode_t)
- };
-
-
- ASSERT(offsetof(xfs_dinode_t, di_core) == 0);
- ASSERT((fields & (XFS_DI_U|XFS_DI_A)) == 0);
- mp = tp->t_mountp;
- /*
- * Get the inode-relative first and last bytes for these fields
- */
- xfs_btree_offsets(fields, offsets, XFS_DI_NUM_BITS, &first, &last);
- /*
- * Convert to buffer offsets and log it.
- */
- ioffset = off << mp->m_sb.sb_inodelog;
- first += ioffset;
- last += ioffset;
- xfs_trans_log_buf(tp, bp, first, last);
-}
/*
* Allocation group level functions.
@@ -119,6 +57,102 @@ xfs_ialloc_cluster_alignment(
}
/*
+ * Lookup the record equal to ino in the btree given by cur.
+ */
+STATIC int /* error */
+xfs_inobt_lookup_eq(
+ struct xfs_btree_cur *cur, /* btree cursor */
+ xfs_agino_t ino, /* starting inode of chunk */
+ __int32_t fcnt, /* free inode count */
+ xfs_inofree_t free, /* free inode mask */
+ int *stat) /* success/failure */
+{
+ cur->bc_rec.i.ir_startino = ino;
+ cur->bc_rec.i.ir_freecount = fcnt;
+ cur->bc_rec.i.ir_free = free;
+ return xfs_btree_lookup(cur, XFS_LOOKUP_EQ, stat);
+}
+
+/*
+ * Lookup the first record greater than or equal to ino
+ * in the btree given by cur.
+ */
+int /* error */
+xfs_inobt_lookup_ge(
+ struct xfs_btree_cur *cur, /* btree cursor */
+ xfs_agino_t ino, /* starting inode of chunk */
+ __int32_t fcnt, /* free inode count */
+ xfs_inofree_t free, /* free inode mask */
+ int *stat) /* success/failure */
+{
+ cur->bc_rec.i.ir_startino = ino;
+ cur->bc_rec.i.ir_freecount = fcnt;
+ cur->bc_rec.i.ir_free = free;
+ return xfs_btree_lookup(cur, XFS_LOOKUP_GE, stat);
+}
+
+/*
+ * Lookup the first record less than or equal to ino
+ * in the btree given by cur.
+ */
+int /* error */
+xfs_inobt_lookup_le(
+ struct xfs_btree_cur *cur, /* btree cursor */
+ xfs_agino_t ino, /* starting inode of chunk */
+ __int32_t fcnt, /* free inode count */
+ xfs_inofree_t free, /* free inode mask */
+ int *stat) /* success/failure */
+{
+ cur->bc_rec.i.ir_startino = ino;
+ cur->bc_rec.i.ir_freecount = fcnt;
+ cur->bc_rec.i.ir_free = free;
+ return xfs_btree_lookup(cur, XFS_LOOKUP_LE, stat);
+}
+
+/*
+ * Update the record referred to by cur to the value given
+ * by [ino, fcnt, free].
+ * This either works (return 0) or gets an EFSCORRUPTED error.
+ */
+STATIC int /* error */
+xfs_inobt_update(
+ struct xfs_btree_cur *cur, /* btree cursor */
+ xfs_agino_t ino, /* starting inode of chunk */
+ __int32_t fcnt, /* free inode count */
+ xfs_inofree_t free) /* free inode mask */
+{
+ union xfs_btree_rec rec;
+
+ rec.inobt.ir_startino = cpu_to_be32(ino);
+ rec.inobt.ir_freecount = cpu_to_be32(fcnt);
+ rec.inobt.ir_free = cpu_to_be64(free);
+ return xfs_btree_update(cur, &rec);
+}
+
+/*
+ * Get the data from the pointed-to record.
+ */
+int /* error */
+xfs_inobt_get_rec(
+ struct xfs_btree_cur *cur, /* btree cursor */
+ xfs_agino_t *ino, /* output: starting inode of chunk */
+ __int32_t *fcnt, /* output: number of free inodes */
+ xfs_inofree_t *free, /* output: free inode mask */
+ int *stat) /* output: success/failure */
+{
+ union xfs_btree_rec *rec;
+ int error;
+
+ error = xfs_btree_get_rec(cur, &rec, stat);
+ if (!error && *stat == 1) {
+ *ino = be32_to_cpu(rec->inobt.ir_startino);
+ *fcnt = be32_to_cpu(rec->inobt.ir_freecount);
+ *free = be64_to_cpu(rec->inobt.ir_free);
+ }
+ return error;
+}
+
+/*
* Allocate new inodes in the allocation group specified by agbp.
* Return 0 for success, else error code.
*/
@@ -287,9 +321,9 @@ xfs_ialloc_ag_alloc(
* able to use the file system.
*/
if (xfs_sb_version_hasnlink(&args.mp->m_sb))
- version = XFS_DINODE_VERSION_2;
+ version = 2;
else
- version = XFS_DINODE_VERSION_1;
+ version = 1;
/*
* Seed the new inode cluster with a random generation number. This
@@ -310,18 +344,25 @@ xfs_ialloc_ag_alloc(
XFS_BUF_LOCK);
ASSERT(fbuf);
ASSERT(!XFS_BUF_GETERROR(fbuf));
+
/*
- * Set initial values for the inodes in this buffer.
+ * Initialize all inodes in this buffer and then log them.
+ *
+ * XXX: It would be much better if we had just one transaction to
+ * log a whole cluster of inodes instead of all the indivdual
+ * transactions causing a lot of log traffic.
*/
xfs_biozero(fbuf, 0, ninodes << args.mp->m_sb.sb_inodelog);
for (i = 0; i < ninodes; i++) {
+ int ioffset = i << args.mp->m_sb.sb_inodelog;
+ uint isize = sizeof(struct xfs_dinode);
+
free = XFS_MAKE_IPTR(args.mp, fbuf, i);
- free->di_core.di_magic = cpu_to_be16(XFS_DINODE_MAGIC);
- free->di_core.di_version = version;
- free->di_core.di_gen = cpu_to_be32(gen);
+ free->di_magic = cpu_to_be16(XFS_DINODE_MAGIC);
+ free->di_version = version;
+ free->di_gen = cpu_to_be32(gen);
free->di_next_unlinked = cpu_to_be32(NULLAGINO);
- xfs_ialloc_log_di(tp, fbuf, i,
- XFS_DI_CORE_BITS | XFS_DI_NEXT_UNLINKED);
+ xfs_trans_log_buf(tp, fbuf, ioffset, ioffset + isize - 1);
}
xfs_trans_inode_alloc_buf(tp, fbuf);
}
@@ -335,8 +376,7 @@ xfs_ialloc_ag_alloc(
/*
* Insert records describing the new inode chunk into the btree.
*/
- cur = xfs_btree_init_cursor(args.mp, tp, agbp, agno,
- XFS_BTNUM_INO, (xfs_inode_t *)0, 0);
+ cur = xfs_inobt_init_cursor(args.mp, tp, agbp, agno);
for (thisino = newino;
thisino < newino + newlen;
thisino += XFS_INODES_PER_CHUNK) {
@@ -346,7 +386,7 @@ xfs_ialloc_ag_alloc(
return error;
}
ASSERT(i == 0);
- if ((error = xfs_inobt_insert(cur, &i))) {
+ if ((error = xfs_btree_insert(cur, &i))) {
xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
return error;
}
@@ -676,8 +716,7 @@ nextag:
*/
agno = tagno;
*IO_agbp = NULL;
- cur = xfs_btree_init_cursor(mp, tp, agbp, be32_to_cpu(agi->agi_seqno),
- XFS_BTNUM_INO, (xfs_inode_t *)0, 0);
+ cur = xfs_inobt_init_cursor(mp, tp, agbp, be32_to_cpu(agi->agi_seqno));
/*
* If pagino is 0 (this is the root inode allocation) use newino.
* This must work because we've just allocated some.
@@ -697,7 +736,7 @@ nextag:
goto error0;
XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
freecount += rec.ir_freecount;
- if ((error = xfs_inobt_increment(cur, 0, &i)))
+ if ((error = xfs_btree_increment(cur, 0, &i)))
goto error0;
} while (i == 1);
@@ -741,7 +780,7 @@ nextag:
/*
* Search left with tcur, back up 1 record.
*/
- if ((error = xfs_inobt_decrement(tcur, 0, &i)))
+ if ((error = xfs_btree_decrement(tcur, 0, &i)))
goto error1;
doneleft = !i;
if (!doneleft) {
@@ -755,7 +794,7 @@ nextag:
/*
* Search right with cur, go forward 1 record.
*/
- if ((error = xfs_inobt_increment(cur, 0, &i)))
+ if ((error = xfs_btree_increment(cur, 0, &i)))
goto error1;
doneright = !i;
if (!doneright) {
@@ -817,7 +856,7 @@ nextag:
* further left.
*/
if (useleft) {
- if ((error = xfs_inobt_decrement(tcur, 0,
+ if ((error = xfs_btree_decrement(tcur, 0,
&i)))
goto error1;
doneleft = !i;
@@ -837,7 +876,7 @@ nextag:
* further right.
*/
else {
- if ((error = xfs_inobt_increment(cur, 0,
+ if ((error = xfs_btree_increment(cur, 0,
&i)))
goto error1;
doneright = !i;
@@ -892,7 +931,7 @@ nextag:
XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
if (rec.ir_freecount > 0)
break;
- if ((error = xfs_inobt_increment(cur, 0, &i)))
+ if ((error = xfs_btree_increment(cur, 0, &i)))
goto error0;
XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
}
@@ -926,7 +965,7 @@ nextag:
goto error0;
XFS_WANT_CORRUPTED_GOTO(i == 1, error0);
freecount += rec.ir_freecount;
- if ((error = xfs_inobt_increment(cur, 0, &i)))
+ if ((error = xfs_btree_increment(cur, 0, &i)))
goto error0;
} while (i == 1);
ASSERT(freecount == be32_to_cpu(agi->agi_freecount) ||
@@ -1022,8 +1061,7 @@ xfs_difree(
/*
* Initialize the cursor.
*/
- cur = xfs_btree_init_cursor(mp, tp, agbp, agno, XFS_BTNUM_INO,
- (xfs_inode_t *)0, 0);
+ cur = xfs_inobt_init_cursor(mp, tp, agbp, agno);
#ifdef DEBUG
if (cur->bc_nlevels == 1) {
int freecount = 0;
@@ -1036,7 +1074,7 @@ xfs_difree(
goto error0;
if (i) {
freecount += rec.ir_freecount;
- if ((error = xfs_inobt_increment(cur, 0, &i)))
+ if ((error = xfs_btree_increment(cur, 0, &i)))
goto error0;
}
} while (i == 1);
@@ -1098,8 +1136,8 @@ xfs_difree(
xfs_trans_mod_sb(tp, XFS_TRANS_SB_ICOUNT, -ilen);
xfs_trans_mod_sb(tp, XFS_TRANS_SB_IFREE, -(ilen - 1));
- if ((error = xfs_inobt_delete(cur, &i))) {
- cmn_err(CE_WARN, "xfs_difree: xfs_inobt_delete returned an error %d on %s.\n",
+ if ((error = xfs_btree_delete(cur, &i))) {
+ cmn_err(CE_WARN, "xfs_difree: xfs_btree_delete returned an error %d on %s.\n",
error, mp->m_fsname);
goto error0;
}
@@ -1141,7 +1179,7 @@ xfs_difree(
goto error0;
if (i) {
freecount += rec.ir_freecount;
- if ((error = xfs_inobt_increment(cur, 0, &i)))
+ if ((error = xfs_btree_increment(cur, 0, &i)))
goto error0;
}
} while (i == 1);
@@ -1158,36 +1196,28 @@ error0:
}
/*
- * Return the location of the inode in bno/off, for mapping it into a buffer.
+ * Return the location of the inode in imap, for mapping it into a buffer.
*/
-/*ARGSUSED*/
int
-xfs_dilocate(
- xfs_mount_t *mp, /* file system mount structure */
- xfs_trans_t *tp, /* transaction pointer */
+xfs_imap(
+ xfs_mount_t *mp, /* file system mount structure */
+ xfs_trans_t *tp, /* transaction pointer */
xfs_ino_t ino, /* inode to locate */
- xfs_fsblock_t *bno, /* output: block containing inode */
- int *len, /* output: num blocks in inode cluster */
- int *off, /* output: index in block of inode */
- uint flags) /* flags concerning inode lookup */
+ struct xfs_imap *imap, /* location map structure */
+ uint flags) /* flags for inode btree lookup */
{
xfs_agblock_t agbno; /* block number of inode in the alloc group */
- xfs_buf_t *agbp; /* agi buffer */
xfs_agino_t agino; /* inode number within alloc group */
xfs_agnumber_t agno; /* allocation group number */
int blks_per_cluster; /* num blocks per inode cluster */
xfs_agblock_t chunk_agbno; /* first block in inode chunk */
- xfs_agino_t chunk_agino; /* first agino in inode chunk */
- __int32_t chunk_cnt; /* count of free inodes in chunk */
- xfs_inofree_t chunk_free; /* mask of free inodes in chunk */
xfs_agblock_t cluster_agbno; /* first block in inode cluster */
- xfs_btree_cur_t *cur; /* inode btree cursor */
int error; /* error code */
- int i; /* temp state */
int offset; /* index of inode in its buffer */
int offset_agbno; /* blks from chunk start to inode */
ASSERT(ino != NULLFSINO);
+
/*
* Split up the inode number into its parts.
*/
@@ -1198,24 +1228,24 @@ xfs_dilocate(
ino != XFS_AGINO_TO_INO(mp, agno, agino)) {
#ifdef DEBUG
/* no diagnostics for bulkstat, ino comes from userspace */
- if (flags & XFS_IMAP_BULKSTAT)
+ if (flags & XFS_IGET_BULKSTAT)
return XFS_ERROR(EINVAL);
if (agno >= mp->m_sb.sb_agcount) {
xfs_fs_cmn_err(CE_ALERT, mp,
- "xfs_dilocate: agno (%d) >= "
+ "xfs_imap: agno (%d) >= "
"mp->m_sb.sb_agcount (%d)",
agno, mp->m_sb.sb_agcount);
}
if (agbno >= mp->m_sb.sb_agblocks) {
xfs_fs_cmn_err(CE_ALERT, mp,
- "xfs_dilocate: agbno (0x%llx) >= "
+ "xfs_imap: agbno (0x%llx) >= "
"mp->m_sb.sb_agblocks (0x%lx)",
(unsigned long long) agbno,
(unsigned long) mp->m_sb.sb_agblocks);
}
if (ino != XFS_AGINO_TO_INO(mp, agno, agino)) {
xfs_fs_cmn_err(CE_ALERT, mp,
- "xfs_dilocate: ino (0x%llx) != "
+ "xfs_imap: ino (0x%llx) != "
"XFS_AGINO_TO_INO(mp, agno, agino) "
"(0x%llx)",
ino, XFS_AGINO_TO_INO(mp, agno, agino));
@@ -1224,65 +1254,89 @@ xfs_dilocate(
#endif /* DEBUG */
return XFS_ERROR(EINVAL);
}
- if ((mp->m_sb.sb_blocksize >= XFS_INODE_CLUSTER_SIZE(mp)) ||
- !(flags & XFS_IMAP_LOOKUP)) {
+
+ /*
+ * If the inode cluster size is the same as the blocksize or
+ * smaller we get to the buffer by simple arithmetics.
+ */
+ if (XFS_INODE_CLUSTER_SIZE(mp) <= mp->m_sb.sb_blocksize) {
offset = XFS_INO_TO_OFFSET(mp, ino);
ASSERT(offset < mp->m_sb.sb_inopblock);
- *bno = XFS_AGB_TO_FSB(mp, agno, agbno);
- *off = offset;
- *len = 1;
+
+ imap->im_blkno = XFS_AGB_TO_DADDR(mp, agno, agbno);
+ imap->im_len = XFS_FSB_TO_BB(mp, 1);
+ imap->im_boffset = (ushort)(offset << mp->m_sb.sb_inodelog);
return 0;
}
+
blks_per_cluster = XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_blocklog;
- if (*bno != NULLFSBLOCK) {
+
+ /*
+ * If we get a block number passed from bulkstat we can use it to
+ * find the buffer easily.
+ */
+ if (imap->im_blkno) {
offset = XFS_INO_TO_OFFSET(mp, ino);
ASSERT(offset < mp->m_sb.sb_inopblock);
- cluster_agbno = XFS_FSB_TO_AGBNO(mp, *bno);
- *off = ((agbno - cluster_agbno) * mp->m_sb.sb_inopblock) +
- offset;
- *len = blks_per_cluster;
+
+ cluster_agbno = XFS_DADDR_TO_AGBNO(mp, imap->im_blkno);
+ offset += (agbno - cluster_agbno) * mp->m_sb.sb_inopblock;
+
+ imap->im_len = XFS_FSB_TO_BB(mp, blks_per_cluster);
+ imap->im_boffset = (ushort)(offset << mp->m_sb.sb_inodelog);
return 0;
}
+
+ /*
+ * If the inode chunks are aligned then use simple maths to
+ * find the location. Otherwise we have to do a btree
+ * lookup to find the location.
+ */
if (mp->m_inoalign_mask) {
offset_agbno = agbno & mp->m_inoalign_mask;
chunk_agbno = agbno - offset_agbno;
} else {
+ xfs_btree_cur_t *cur; /* inode btree cursor */
+ xfs_agino_t chunk_agino; /* first agino in inode chunk */
+ __int32_t chunk_cnt; /* count of free inodes in chunk */
+ xfs_inofree_t chunk_free; /* mask of free inodes in chunk */
+ xfs_buf_t *agbp; /* agi buffer */
+ int i; /* temp state */
+
down_read(&mp->m_peraglock);
error = xfs_ialloc_read_agi(mp, tp, agno, &agbp);
up_read(&mp->m_peraglock);
if (error) {
-#ifdef DEBUG
- xfs_fs_cmn_err(CE_ALERT, mp, "xfs_dilocate: "
+ xfs_fs_cmn_err(CE_ALERT, mp, "xfs_imap: "
"xfs_ialloc_read_agi() returned "
"error %d, agno %d",
error, agno);
-#endif /* DEBUG */
return error;
}
- cur = xfs_btree_init_cursor(mp, tp, agbp, agno, XFS_BTNUM_INO,
- (xfs_inode_t *)0, 0);
- if ((error = xfs_inobt_lookup_le(cur, agino, 0, 0, &i))) {
-#ifdef DEBUG
- xfs_fs_cmn_err(CE_ALERT, mp, "xfs_dilocate: "
+
+ cur = xfs_inobt_init_cursor(mp, tp, agbp, agno);
+ error = xfs_inobt_lookup_le(cur, agino, 0, 0, &i);
+ if (error) {
+ xfs_fs_cmn_err(CE_ALERT, mp, "xfs_imap: "
"xfs_inobt_lookup_le() failed");
-#endif /* DEBUG */
goto error0;
}
- if ((error = xfs_inobt_get_rec(cur, &chunk_agino, &chunk_cnt,
- &chunk_free, &i))) {
-#ifdef DEBUG
- xfs_fs_cmn_err(CE_ALERT, mp, "xfs_dilocate: "
+
+ error = xfs_inobt_get_rec(cur, &chunk_agino, &chunk_cnt,
+ &chunk_free, &i);
+ if (error) {
+ xfs_fs_cmn_err(CE_ALERT, mp, "xfs_imap: "
"xfs_inobt_get_rec() failed");
-#endif /* DEBUG */
goto error0;
}
if (i == 0) {
#ifdef DEBUG
- xfs_fs_cmn_err(CE_ALERT, mp, "xfs_dilocate: "
+ xfs_fs_cmn_err(CE_ALERT, mp, "xfs_imap: "
"xfs_inobt_get_rec() failed");
#endif /* DEBUG */
error = XFS_ERROR(EINVAL);
}
+ error0:
xfs_trans_brelse(tp, agbp);
xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
if (error)
@@ -1290,19 +1344,35 @@ xfs_dilocate(
chunk_agbno = XFS_AGINO_TO_AGBNO(mp, chunk_agino);
offset_agbno = agbno - chunk_agbno;
}
+
ASSERT(agbno >= chunk_agbno);
cluster_agbno = chunk_agbno +
((offset_agbno / blks_per_cluster) * blks_per_cluster);
offset = ((agbno - cluster_agbno) * mp->m_sb.sb_inopblock) +
XFS_INO_TO_OFFSET(mp, ino);
- *bno = XFS_AGB_TO_FSB(mp, agno, cluster_agbno);
- *off = offset;
- *len = blks_per_cluster;
+
+ imap->im_blkno = XFS_AGB_TO_DADDR(mp, agno, cluster_agbno);
+ imap->im_len = XFS_FSB_TO_BB(mp, blks_per_cluster);
+ imap->im_boffset = (ushort)(offset << mp->m_sb.sb_inodelog);
+
+ /*
+ * If the inode number maps to a block outside the bounds
+ * of the file system then return NULL rather than calling
+ * read_buf and panicing when we get an error from the
+ * driver.
+ */
+ if ((imap->im_blkno + imap->im_len) >
+ XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks)) {
+ xfs_fs_cmn_err(CE_ALERT, mp, "xfs_imap: "
+ "(imap->im_blkno (0x%llx) + imap->im_len (0x%llx)) > "
+ " XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks) (0x%llx)",
+ (unsigned long long) imap->im_blkno,
+ (unsigned long long) imap->im_len,
+ XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks));
+ return XFS_ERROR(EINVAL);
+ }
+
return 0;
-error0:
- xfs_trans_brelse(tp, agbp);
- xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
- return error;
}
/*
@@ -1370,70 +1440,95 @@ xfs_ialloc_log_agi(
xfs_trans_log_buf(tp, bp, first, last);
}
+#ifdef DEBUG
+STATIC void
+xfs_check_agi_unlinked(
+ struct xfs_agi *agi)
+{
+ int i;
+
+ for (i = 0; i < XFS_AGI_UNLINKED_BUCKETS; i++)
+ ASSERT(agi->agi_unlinked[i]);
+}
+#else
+#define xfs_check_agi_unlinked(agi)
+#endif
+
/*
* Read in the allocation group header (inode allocation section)
*/
int
-xfs_ialloc_read_agi(
- xfs_mount_t *mp, /* file system mount structure */
- xfs_trans_t *tp, /* transaction pointer */
- xfs_agnumber_t agno, /* allocation group number */
- xfs_buf_t **bpp) /* allocation group hdr buf */
+xfs_read_agi(
+ struct xfs_mount *mp, /* file system mount structure */
+ struct xfs_trans *tp, /* transaction pointer */
+ xfs_agnumber_t agno, /* allocation group number */
+ struct xfs_buf **bpp) /* allocation group hdr buf */
{
- xfs_agi_t *agi; /* allocation group header */
- int agi_ok; /* agi is consistent */
- xfs_buf_t *bp; /* allocation group hdr buf */
- xfs_perag_t *pag; /* per allocation group data */
- int error;
+ struct xfs_agi *agi; /* allocation group header */
+ int agi_ok; /* agi is consistent */
+ int error;
ASSERT(agno != NULLAGNUMBER);
- error = xfs_trans_read_buf(
- mp, tp, mp->m_ddev_targp,
+
+ error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp,
XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)),
- XFS_FSS_TO_BB(mp, 1), 0, &bp);
+ XFS_FSS_TO_BB(mp, 1), 0, bpp);
if (error)
return error;
- ASSERT(bp && !XFS_BUF_GETERROR(bp));
+
+ ASSERT(*bpp && !XFS_BUF_GETERROR(*bpp));
+ agi = XFS_BUF_TO_AGI(*bpp);
/*
* Validate the magic number of the agi block.
*/
- agi = XFS_BUF_TO_AGI(bp);
- agi_ok =
- be32_to_cpu(agi->agi_magicnum) == XFS_AGI_MAGIC &&
- XFS_AGI_GOOD_VERSION(be32_to_cpu(agi->agi_versionnum));
+ agi_ok = be32_to_cpu(agi->agi_magicnum) == XFS_AGI_MAGIC &&
+ XFS_AGI_GOOD_VERSION(be32_to_cpu(agi->agi_versionnum)) &&
+ be32_to_cpu(agi->agi_seqno) == agno;
if (unlikely(XFS_TEST_ERROR(!agi_ok, mp, XFS_ERRTAG_IALLOC_READ_AGI,
XFS_RANDOM_IALLOC_READ_AGI))) {
- XFS_CORRUPTION_ERROR("xfs_ialloc_read_agi", XFS_ERRLEVEL_LOW,
+ XFS_CORRUPTION_ERROR("xfs_read_agi", XFS_ERRLEVEL_LOW,
mp, agi);
- xfs_trans_brelse(tp, bp);
+ xfs_trans_brelse(tp, *bpp);
return XFS_ERROR(EFSCORRUPTED);
}
+
+ XFS_BUF_SET_VTYPE_REF(*bpp, B_FS_AGI, XFS_AGI_REF);
+
+ xfs_check_agi_unlinked(agi);
+ return 0;
+}
+
+int
+xfs_ialloc_read_agi(
+ struct xfs_mount *mp, /* file system mount structure */
+ struct xfs_trans *tp, /* transaction pointer */
+ xfs_agnumber_t agno, /* allocation group number */
+ struct xfs_buf **bpp) /* allocation group hdr buf */
+{
+ struct xfs_agi *agi; /* allocation group header */
+ struct xfs_perag *pag; /* per allocation group data */
+ int error;
+
+ error = xfs_read_agi(mp, tp, agno, bpp);
+ if (error)
+ return error;
+
+ agi = XFS_BUF_TO_AGI(*bpp);
pag = &mp->m_perag[agno];
+
if (!pag->pagi_init) {
pag->pagi_freecount = be32_to_cpu(agi->agi_freecount);
pag->pagi_count = be32_to_cpu(agi->agi_count);
pag->pagi_init = 1;
- } else {
- /*
- * It's possible for these to be out of sync if
- * we are in the middle of a forced shutdown.
- */
- ASSERT(pag->pagi_freecount == be32_to_cpu(agi->agi_freecount) ||
- XFS_FORCED_SHUTDOWN(mp));
}
-#ifdef DEBUG
- {
- int i;
-
- for (i = 0; i < XFS_AGI_UNLINKED_BUCKETS; i++)
- ASSERT(agi->agi_unlinked[i]);
- }
-#endif
-
- XFS_BUF_SET_VTYPE_REF(bp, B_FS_AGI, XFS_AGI_REF);
- *bpp = bp;
+ /*
+ * It's possible for these to be out of sync if
+ * we are in the middle of a forced shutdown.
+ */
+ ASSERT(pag->pagi_freecount == be32_to_cpu(agi->agi_freecount) ||
+ XFS_FORCED_SHUTDOWN(mp));
return 0;
}