[36/68] xfs: remove block number from inode lookup code

From: Greg KH
Date: Mon Feb 28 2011 - 11:46:24 EST

2.6.32-longterm review patch. If anyone has any objections, please let us know.

------------------


From: Dave Chinner <dchinner@xxxxxxxxxx>

Upstream commit: 7b6259e7a83647948fa33a736cc832310c8d85aa

The block number comes from bulkstat based inode lookups to shortcut
the mapping calculations. We ar enot able to trust anything from
bulkstat, so drop the block number as well so that the correct
lookups and mappings are always done.

Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
[dannf: Backported to 2.6.32.y]
Cc: dann frazier <dannf@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
fs/xfs/linux-2.6/xfs_export.c | 2 +-
fs/xfs/linux-2.6/xfs_ioctl32.c | 5 ++---
fs/xfs/quota/xfs_qm.c | 7 +++----
fs/xfs/quota/xfs_qm_syscalls.c | 11 +++++------
fs/xfs/xfs_ialloc.c | 16 ----------------
fs/xfs/xfs_iget.c | 10 +++-------
fs/xfs/xfs_inode.c | 3 ---
fs/xfs/xfs_inode.h | 4 ++--
fs/xfs/xfs_itable.c | 12 ++++--------
fs/xfs/xfs_itable.h | 3 ---
fs/xfs/xfs_log_recover.c | 2 +-
fs/xfs/xfs_mount.c | 2 +-
fs/xfs/xfs_rtalloc.c | 4 ++--
fs/xfs/xfs_trans_inode.c | 2 +-
fs/xfs/xfs_vnodeops.c | 2 +-
15 files changed, 26 insertions(+), 59 deletions(-)

--- a/fs/xfs/linux-2.6/xfs_export.c
+++ b/fs/xfs/linux-2.6/xfs_export.c
@@ -132,7 +132,7 @@ xfs_nfs_get_inode(
* send invalid file handles and we have to handle it gracefully..
*/
error = xfs_iget(mp, NULL, ino, XFS_IGET_UNTRUSTED,
- XFS_ILOCK_SHARED, &ip, 0);
+ XFS_ILOCK_SHARED, &ip);
if (error) {
/*
* EINVAL means the inode cluster doesn't exist anymore.
--- a/fs/xfs/linux-2.6/xfs_ioctl32.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl32.c
@@ -235,12 +235,11 @@ xfs_bulkstat_one_compat(
xfs_ino_t ino, /* inode number to get data for */
void __user *buffer, /* buffer to place output in */
int ubsize, /* size of buffer */
- xfs_daddr_t bno, /* starting bno of inode cluster */
int *ubused, /* bytes used by me */
int *stat) /* BULKSTAT_RV_... */
{
return xfs_bulkstat_one_int(mp, ino, buffer, ubsize,
- xfs_bulkstat_one_fmt_compat, bno,
+ xfs_bulkstat_one_fmt_compat,
ubused, stat);
}

@@ -294,7 +293,7 @@ xfs_compat_ioc_bulkstat(
int res;

error = xfs_bulkstat_one_compat(mp, inlast, bulkreq.ubuffer,
- sizeof(compat_xfs_bstat_t), 0, NULL, &res);
+ sizeof(compat_xfs_bstat_t), 0, &res);
} else if (cmd == XFS_IOC_FSBULKSTAT_32) {
error = xfs_bulkstat(mp, &inlast, &count,
xfs_bulkstat_one_compat, sizeof(compat_xfs_bstat_t),
--- a/fs/xfs/quota/xfs_qm.c
+++ b/fs/xfs/quota/xfs_qm.c
@@ -1606,7 +1606,6 @@ xfs_qm_dqusage_adjust(
xfs_ino_t ino, /* inode number to get data for */
void __user *buffer, /* not used */
int ubsize, /* not used */
- xfs_daddr_t bno, /* starting block of inode cluster */
int *ubused, /* not used */
int *res) /* result code value */
{
@@ -1632,7 +1631,7 @@ xfs_qm_dqusage_adjust(
* the case in all other instances. It's OK that we do this because
* quotacheck is done only at mount time.
*/
- if ((error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip, bno))) {
+ if ((error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip))) {
*res = BULKSTAT_RV_NOTHING;
return error;
}
@@ -1858,14 +1857,14 @@ xfs_qm_init_quotainos(
mp->m_sb.sb_uquotino != NULLFSINO) {
ASSERT(mp->m_sb.sb_uquotino > 0);
if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
- 0, 0, &uip, 0)))
+ 0, 0, &uip)))
return XFS_ERROR(error);
}
if (XFS_IS_OQUOTA_ON(mp) &&
mp->m_sb.sb_gquotino != NULLFSINO) {
ASSERT(mp->m_sb.sb_gquotino > 0);
if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
- 0, 0, &gip, 0))) {
+ 0, 0, &gip))) {
if (uip)
IRELE(uip);
return XFS_ERROR(error);
--- a/fs/xfs/quota/xfs_qm_syscalls.c
+++ b/fs/xfs/quota/xfs_qm_syscalls.c
@@ -266,7 +266,7 @@ xfs_qm_scall_trunc_qfiles(
}

if ((flags & XFS_DQ_USER) && mp->m_sb.sb_uquotino != NULLFSINO) {
- error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino, 0, 0, &qip, 0);
+ error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino, 0, 0, &qip);
if (!error) {
error = xfs_truncate_file(mp, qip);
IRELE(qip);
@@ -275,7 +275,7 @@ xfs_qm_scall_trunc_qfiles(

if ((flags & (XFS_DQ_GROUP|XFS_DQ_PROJ)) &&
mp->m_sb.sb_gquotino != NULLFSINO) {
- error2 = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino, 0, 0, &qip, 0);
+ error2 = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino, 0, 0, &qip);
if (!error2) {
error2 = xfs_truncate_file(mp, qip);
IRELE(qip);
@@ -420,12 +420,12 @@ xfs_qm_scall_getqstat(
}
if (!uip && mp->m_sb.sb_uquotino != NULLFSINO) {
if (xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
- 0, 0, &uip, 0) == 0)
+ 0, 0, &uip) == 0)
tempuqip = B_TRUE;
}
if (!gip && mp->m_sb.sb_gquotino != NULLFSINO) {
if (xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
- 0, 0, &gip, 0) == 0)
+ 0, 0, &gip) == 0)
tempgqip = B_TRUE;
}
if (uip) {
@@ -1114,7 +1114,6 @@ xfs_qm_internalqcheck_adjust(
xfs_ino_t ino, /* inode number to get data for */
void __user *buffer, /* not used */
int ubsize, /* not used */
- xfs_daddr_t bno, /* starting block of inode cluster */
int *ubused, /* not used */
int *res) /* bulkstat result code */
{
@@ -1137,7 +1136,7 @@ xfs_qm_internalqcheck_adjust(
ipreleased = B_FALSE;
again:
lock_flags = XFS_ILOCK_SHARED;
- if ((error = xfs_iget(mp, NULL, ino, 0, lock_flags, &ip, bno))) {
+ if ((error = xfs_iget(mp, NULL, ino, 0, lock_flags, &ip))) {
*res = BULKSTAT_RV_NOTHING;
return (error);
}
--- a/fs/xfs/xfs_ialloc.c
+++ b/fs/xfs/xfs_ialloc.c
@@ -1360,22 +1360,6 @@ xfs_imap(
}

/*
- * If we get a block number passed 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_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.
--- a/fs/xfs/xfs_iget.c
+++ b/fs/xfs/xfs_iget.c
@@ -295,7 +295,6 @@ xfs_iget_cache_miss(
xfs_trans_t *tp,
xfs_ino_t ino,
struct xfs_inode **ipp,
- xfs_daddr_t bno,
int flags,
int lock_flags) __releases(pag->pag_ici_lock)
{
@@ -308,7 +307,7 @@ xfs_iget_cache_miss(
if (!ip)
return ENOMEM;

- error = xfs_iread(mp, tp, ip, bno, flags);
+ error = xfs_iread(mp, tp, ip, flags);
if (error)
goto out_destroy;

@@ -392,8 +391,6 @@ out_destroy:
* within the file system for the inode being requested.
* lock_flags -- flags indicating how to lock the inode. See the comment
* for xfs_ilock() for a list of valid values.
- * bno -- the block number starting the buffer containing the inode,
- * if known (as by bulkstat), else 0.
*/
int
xfs_iget(
@@ -402,8 +399,7 @@ xfs_iget(
xfs_ino_t ino,
uint flags,
uint lock_flags,
- xfs_inode_t **ipp,
- xfs_daddr_t bno)
+ xfs_inode_t **ipp)
{
xfs_inode_t *ip;
int error;
@@ -434,7 +430,7 @@ again:
read_unlock(&pag->pag_ici_lock);
XFS_STATS_INC(xs_ig_missed);

- error = xfs_iget_cache_miss(mp, pag, tp, ino, &ip, bno,
+ error = xfs_iget_cache_miss(mp, pag, tp, ino, &ip,
flags, lock_flags);
if (error)
goto out_error_or_again;
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -787,7 +787,6 @@ xfs_iread(
xfs_mount_t *mp,
xfs_trans_t *tp,
xfs_inode_t *ip,
- xfs_daddr_t bno,
uint iget_flags)
{
xfs_buf_t *bp;
@@ -797,11 +796,9 @@ xfs_iread(
/*
* Fill in the location information in the in-core inode.
*/
- ip->i_imap.im_blkno = bno;
error = xfs_imap(mp, tp, ip->i_ino, &ip->i_imap, iget_flags);
if (error)
return error;
- ASSERT(bno == 0 || bno == ip->i_imap.im_blkno);

/*
* Get pointers to the on-disk inode and the buffer containing it.
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -468,7 +468,7 @@ static inline void xfs_ifunlock(xfs_inod
* xfs_iget.c prototypes.
*/
int xfs_iget(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
- uint, uint, xfs_inode_t **, xfs_daddr_t);
+ uint, uint, xfs_inode_t **);
void xfs_iput(xfs_inode_t *, uint);
void xfs_iput_new(xfs_inode_t *, uint);
void xfs_ilock(xfs_inode_t *, uint);
@@ -567,7 +567,7 @@ int xfs_itobp(struct xfs_mount *, struc
struct xfs_inode *, struct xfs_dinode **,
struct xfs_buf **, uint);
int xfs_iread(struct xfs_mount *, struct xfs_trans *,
- struct xfs_inode *, xfs_daddr_t, uint);
+ struct xfs_inode *, uint);
void xfs_dinode_to_disk(struct xfs_dinode *,
struct xfs_icdinode *);
void xfs_idestroy_fork(struct xfs_inode *, int);
--- a/fs/xfs/xfs_itable.c
+++ b/fs/xfs/xfs_itable.c
@@ -60,7 +60,6 @@ xfs_bulkstat_one_int(
void __user *buffer, /* buffer to place output in */
int ubsize, /* size of buffer */
bulkstat_one_fmt_pf formatter, /* formatter, copy to user */
- xfs_daddr_t bno, /* starting bno of cluster */
int *ubused, /* bytes used by me */
int *stat) /* BULKSTAT_RV_... */
{
@@ -80,7 +79,7 @@ xfs_bulkstat_one_int(
return XFS_ERROR(ENOMEM);

error = xfs_iget(mp, NULL, ino,
- XFS_IGET_UNTRUSTED, XFS_ILOCK_SHARED, &ip, bno);
+ XFS_IGET_UNTRUSTED, XFS_ILOCK_SHARED, &ip);
if (error) {
*stat = BULKSTAT_RV_NOTHING;
goto out_free;
@@ -178,13 +177,11 @@ xfs_bulkstat_one(
xfs_ino_t ino, /* inode number to get data for */
void __user *buffer, /* buffer to place output in */
int ubsize, /* size of buffer */
- xfs_daddr_t bno, /* starting bno of inode cluster */
int *ubused, /* bytes used by me */
int *stat) /* BULKSTAT_RV_... */
{
return xfs_bulkstat_one_int(mp, ino, buffer, ubsize,
- xfs_bulkstat_one_fmt, bno,
- ubused, stat);
+ xfs_bulkstat_one_fmt, ubused, stat);
}

#define XFS_BULKSTAT_UBLEFT(ubleft) ((ubleft) >= statstruct_size)
@@ -484,7 +481,7 @@ xfs_bulkstat(
* Get the inode and fill in a single buffer.
*/
ubused = statstruct_size;
- error = formatter(mp, ino, ubufp, ubleft, bno,
+ error = formatter(mp, ino, ubufp, ubleft,
&ubused, &fmterror);
if (fmterror == BULKSTAT_RV_NOTHING) {
if (error && error != ENOENT &&
@@ -577,8 +574,7 @@ xfs_bulkstat_single(
*/

ino = (xfs_ino_t)*lastinop;
- error = xfs_bulkstat_one(mp, ino, buffer, sizeof(xfs_bstat_t),
- 0, NULL, &res);
+ error = xfs_bulkstat_one(mp, ino, buffer, sizeof(xfs_bstat_t), 0, &res);
if (error) {
/*
* Special case way failed, do it the "long" way
--- a/fs/xfs/xfs_itable.h
+++ b/fs/xfs/xfs_itable.h
@@ -27,7 +27,6 @@ typedef int (*bulkstat_one_pf)(struct xf
xfs_ino_t ino,
void __user *buffer,
int ubsize,
- xfs_daddr_t bno,
int *ubused,
int *stat);

@@ -71,7 +70,6 @@ xfs_bulkstat_one_int(
void __user *buffer,
int ubsize,
bulkstat_one_fmt_pf formatter,
- xfs_daddr_t bno,
int *ubused,
int *stat);

@@ -81,7 +79,6 @@ xfs_bulkstat_one(
xfs_ino_t ino,
void __user *buffer,
int ubsize,
- xfs_daddr_t bno,
int *ubused,
int *stat);

--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -3209,7 +3209,7 @@ xlog_recover_process_one_iunlink(
int error;

ino = XFS_AGINO_TO_INO(mp, agno, agino);
- error = xfs_iget(mp, NULL, ino, 0, 0, &ip, 0);
+ error = xfs_iget(mp, NULL, ino, 0, 0, &ip);
if (error)
goto fail;

--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -1207,7 +1207,7 @@ xfs_mountfs(
* Get and sanity-check the root inode.
* Save the pointer to it in the mount structure.
*/
- error = xfs_iget(mp, NULL, sbp->sb_rootino, 0, XFS_ILOCK_EXCL, &rip, 0);
+ error = xfs_iget(mp, NULL, sbp->sb_rootino, 0, XFS_ILOCK_EXCL, &rip);
if (error) {
cmn_err(CE_WARN, "XFS: failed to read root inode");
goto out_log_dealloc;
--- a/fs/xfs/xfs_rtalloc.c
+++ b/fs/xfs/xfs_rtalloc.c
@@ -2274,12 +2274,12 @@ xfs_rtmount_inodes(
sbp = &mp->m_sb;
if (sbp->sb_rbmino == NULLFSINO)
return 0;
- error = xfs_iget(mp, NULL, sbp->sb_rbmino, 0, 0, &mp->m_rbmip, 0);
+ error = xfs_iget(mp, NULL, sbp->sb_rbmino, 0, 0, &mp->m_rbmip);
if (error)
return error;
ASSERT(mp->m_rbmip != NULL);
ASSERT(sbp->sb_rsumino != NULLFSINO);
- error = xfs_iget(mp, NULL, sbp->sb_rsumino, 0, 0, &mp->m_rsumip, 0);
+ error = xfs_iget(mp, NULL, sbp->sb_rsumino, 0, 0, &mp->m_rsumip);
if (error) {
IRELE(mp->m_rbmip);
return error;
--- a/fs/xfs/xfs_trans_inode.c
+++ b/fs/xfs/xfs_trans_inode.c
@@ -62,7 +62,7 @@ xfs_trans_iget(
{
int error;

- error = xfs_iget(mp, tp, ino, flags, lock_flags, ipp, 0);
+ error = xfs_iget(mp, tp, ino, flags, lock_flags, ipp);
if (!error && tp)
xfs_trans_ijoin(tp, *ipp, lock_flags);
return error;
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -1371,7 +1371,7 @@ xfs_lookup(
if (error)
goto out;

- error = xfs_iget(dp->i_mount, NULL, inum, 0, 0, ipp, 0);
+ error = xfs_iget(dp->i_mount, NULL, inum, 0, 0, ipp);
if (error)
goto out_free_name;



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