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authorJie Liu <jeff.liu@oracle.com>2014-08-04 11:22:31 +1000
committerDave Chinner <david@fromorbit.com>2014-08-04 11:22:31 +1000
commit1e773c4989d2dfe08332b4c18f7e1d7ad633015c (patch)
tree1bbc729141d2aa5be746e34a701668bc272285e7 /fs/xfs
parentf3d1e587437b784635459dcfccaedd17149282cc (diff)
downloadlinux-1e773c4989d2dfe08332b4c18f7e1d7ad633015c.tar.bz2
xfs: introduce xfs_bulkstat_ag_ichunk
Introduce xfs_bulkstat_ag_ichunk() to process inodes in chunk with a pointer to a formatter function that will iget the inode and fill in the appropriate structure. Refactor xfs_bulkstat() with it. Signed-off-by: Jie Liu <jeff.liu@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs')
-rw-r--r--fs/xfs/xfs_itable.c141
-rw-r--r--fs/xfs/xfs_itable.h16
2 files changed, 103 insertions, 54 deletions
diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c
index 32cf52ee33bc..f71be9c68017 100644
--- a/fs/xfs/xfs_itable.c
+++ b/fs/xfs/xfs_itable.c
@@ -263,6 +263,79 @@ xfs_bulkstat_grab_ichunk(
#define XFS_BULKSTAT_UBLEFT(ubleft) ((ubleft) >= statstruct_size)
/*
+ * Process inodes in chunk with a pointer to a formatter function
+ * that will iget the inode and fill in the appropriate structure.
+ */
+int
+xfs_bulkstat_ag_ichunk(
+ struct xfs_mount *mp,
+ xfs_agnumber_t agno,
+ struct xfs_inobt_rec_incore *irbp,
+ bulkstat_one_pf formatter,
+ size_t statstruct_size,
+ struct xfs_bulkstat_agichunk *acp)
+{
+ xfs_ino_t lastino = acp->ac_lastino;
+ char __user **ubufp = acp->ac_ubuffer;
+ int ubleft = acp->ac_ubleft;
+ int ubelem = acp->ac_ubelem;
+ int chunkidx, clustidx;
+ int error = 0;
+ xfs_agino_t agino;
+
+ for (agino = irbp->ir_startino, chunkidx = clustidx = 0;
+ XFS_BULKSTAT_UBLEFT(ubleft) &&
+ irbp->ir_freecount < XFS_INODES_PER_CHUNK;
+ chunkidx++, clustidx++, agino++) {
+ int fmterror; /* bulkstat formatter result */
+ int ubused;
+ xfs_ino_t ino = XFS_AGINO_TO_INO(mp, agno, agino);
+
+ ASSERT(chunkidx < XFS_INODES_PER_CHUNK);
+
+ /* Skip if this inode is free */
+ if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free) {
+ lastino = ino;
+ continue;
+ }
+
+ /*
+ * Count used inodes as free so we can tell when the
+ * chunk is used up.
+ */
+ irbp->ir_freecount++;
+
+ /* Get the inode and fill in a single buffer */
+ ubused = statstruct_size;
+ error = formatter(mp, ino, *ubufp, ubleft, &ubused, &fmterror);
+ if (fmterror == BULKSTAT_RV_NOTHING) {
+ if (error && error != -ENOENT && error != -EINVAL) {
+ ubleft = 0;
+ break;
+ }
+ lastino = ino;
+ continue;
+ }
+ if (fmterror == BULKSTAT_RV_GIVEUP) {
+ ubleft = 0;
+ ASSERT(error);
+ break;
+ }
+ if (*ubufp)
+ *ubufp += ubused;
+ ubleft -= ubused;
+ ubelem++;
+ lastino = ino;
+ }
+
+ acp->ac_lastino = lastino;
+ acp->ac_ubleft = ubleft;
+ acp->ac_ubelem = ubelem;
+
+ return error;
+}
+
+/*
* Return stat information in bulk (by-inode) for the filesystem.
*/
int /* error status */
@@ -279,8 +352,6 @@ xfs_bulkstat(
xfs_agi_t *agi; /* agi header data */
xfs_agino_t agino; /* inode # in allocation group */
xfs_agnumber_t agno; /* allocation group number */
- int chunkidx; /* current index into inode chunk */
- int clustidx; /* current index into inode cluster */
xfs_btree_cur_t *cur; /* btree cursor for ialloc btree */
int end_of_ag; /* set if we've seen the ag end */
int error; /* error code */
@@ -300,7 +371,6 @@ xfs_bulkstat(
int ubleft; /* bytes left in user's buffer */
char __user *ubufp; /* pointer into user's buffer */
int ubelem; /* spaces used in user's buffer */
- int ubused; /* bytes used by formatter */
/*
* Get the last inode value, see if there's nothing to do.
@@ -419,57 +489,20 @@ xfs_bulkstat(
irbufend = irbp;
for (irbp = irbuf;
irbp < irbufend && XFS_BULKSTAT_UBLEFT(ubleft); irbp++) {
- /*
- * Now process this chunk of inodes.
- */
- for (agino = irbp->ir_startino, chunkidx = clustidx = 0;
- XFS_BULKSTAT_UBLEFT(ubleft) &&
- irbp->ir_freecount < XFS_INODES_PER_CHUNK;
- chunkidx++, clustidx++, agino++) {
- ASSERT(chunkidx < XFS_INODES_PER_CHUNK);
-
- ino = XFS_AGINO_TO_INO(mp, agno, agino);
- /*
- * Skip if this inode is free.
- */
- if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free) {
- lastino = ino;
- continue;
- }
- /*
- * Count used inodes as free so we can tell
- * when the chunk is used up.
- */
- irbp->ir_freecount++;
-
- /*
- * Get the inode and fill in a single buffer.
- */
- ubused = statstruct_size;
- error = formatter(mp, ino, ubufp, ubleft,
- &ubused, &fmterror);
- if (fmterror == BULKSTAT_RV_NOTHING) {
- if (error && error != -ENOENT &&
- error != -EINVAL) {
- ubleft = 0;
- rval = error;
- break;
- }
- lastino = ino;
- continue;
- }
- if (fmterror == BULKSTAT_RV_GIVEUP) {
- ubleft = 0;
- ASSERT(error);
- rval = error;
- break;
- }
- if (ubufp)
- ubufp += ubused;
- ubleft -= ubused;
- ubelem++;
- lastino = ino;
- }
+ struct xfs_bulkstat_agichunk ac;
+
+ ac.ac_lastino = lastino;
+ ac.ac_ubuffer = &ubuffer;
+ ac.ac_ubleft = ubleft;
+ ac.ac_ubelem = ubelem;
+ error = xfs_bulkstat_ag_ichunk(mp, agno, irbp,
+ formatter, statstruct_size, &ac);
+ if (error)
+ rval = error;
+
+ lastino = ac.ac_lastino;
+ ubleft = ac.ac_ubleft;
+ ubelem = ac.ac_ubelem;
cond_resched();
}
diff --git a/fs/xfs/xfs_itable.h b/fs/xfs/xfs_itable.h
index 6ea8b3912fa4..aaed08022eb9 100644
--- a/fs/xfs/xfs_itable.h
+++ b/fs/xfs/xfs_itable.h
@@ -30,6 +30,22 @@ typedef int (*bulkstat_one_pf)(struct xfs_mount *mp,
int *ubused,
int *stat);
+struct xfs_bulkstat_agichunk {
+ xfs_ino_t ac_lastino; /* last inode returned */
+ char __user **ac_ubuffer;/* pointer into user's buffer */
+ int ac_ubleft; /* bytes left in user's buffer */
+ int ac_ubelem; /* spaces used in user's buffer */
+};
+
+int
+xfs_bulkstat_ag_ichunk(
+ struct xfs_mount *mp,
+ xfs_agnumber_t agno,
+ struct xfs_inobt_rec_incore *irbp,
+ bulkstat_one_pf formatter,
+ size_t statstruct_size,
+ struct xfs_bulkstat_agichunk *acp);
+
/*
* Values for stat return value.
*/