From 42173f6860af7e016a950a9a19a66679cfc46d98 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 22 Apr 2008 17:33:25 +1000 Subject: [XFS] Remove VN_IS* macros and related cruft. We can just check i_mode / di_mode directly. SGI-PV: 976035 SGI-Modid: xfs-linux-melb:xfs-kern:30896a Signed-off-by: Christoph Hellwig Signed-off-by: Lachlan McIlroy --- fs/xfs/linux-2.6/xfs_vnode.h | 24 ------------------------ fs/xfs/xfs_acl.c | 6 +++--- fs/xfs/xfs_vnodeops.c | 20 ++++---------------- 3 files changed, 7 insertions(+), 43 deletions(-) (limited to 'fs') diff --git a/fs/xfs/linux-2.6/xfs_vnode.h b/fs/xfs/linux-2.6/xfs_vnode.h index 8b4d63ce869..9d73cb5c0fc 100644 --- a/fs/xfs/linux-2.6/xfs_vnode.h +++ b/fs/xfs/linux-2.6/xfs_vnode.h @@ -25,12 +25,6 @@ struct attrlist_cursor_kern; typedef struct inode bhv_vnode_t; -#define VN_ISLNK(vp) S_ISLNK((vp)->i_mode) -#define VN_ISREG(vp) S_ISREG((vp)->i_mode) -#define VN_ISDIR(vp) S_ISDIR((vp)->i_mode) -#define VN_ISCHR(vp) S_ISCHR((vp)->i_mode) -#define VN_ISBLK(vp) S_ISBLK((vp)->i_mode) - /* * Vnode to Linux inode mapping. */ @@ -151,24 +145,6 @@ typedef struct bhv_vattr { XFS_AT_TYPE|XFS_AT_BLKSIZE|XFS_AT_NBLOCKS|XFS_AT_VCODE|\ XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS|XFS_AT_GENCOUNT) -/* - * Modes. - */ -#define VSUID S_ISUID /* set user id on execution */ -#define VSGID S_ISGID /* set group id on execution */ -#define VSVTX S_ISVTX /* save swapped text even after use */ -#define VREAD S_IRUSR /* read, write, execute permissions */ -#define VWRITE S_IWUSR -#define VEXEC S_IXUSR - -#define MODEMASK S_IALLUGO /* mode bits plus permission bits */ - -/* - * Check whether mandatory file locking is enabled. - */ -#define MANDLOCK(vp, mode) \ - (VN_ISREG(vp) && ((mode) & (VSGID|(VEXEC>>3))) == VSGID) - extern void vn_init(void); extern int vn_revalidate(bhv_vnode_t *); diff --git a/fs/xfs/xfs_acl.c b/fs/xfs/xfs_acl.c index 8e130b9720a..b1275cc4561 100644 --- a/fs/xfs/xfs_acl.c +++ b/fs/xfs/xfs_acl.c @@ -72,7 +72,7 @@ xfs_acl_vhasacl_default( { int error; - if (!VN_ISDIR(vp)) + if (!S_ISDIR(vp->i_mode)) return 0; xfs_acl_get_attr(vp, NULL, _ACL_TYPE_DEFAULT, ATTR_KERNOVAL, &error); return (error == 0); @@ -379,7 +379,7 @@ xfs_acl_allow_set( if (vp->i_flags & (S_IMMUTABLE|S_APPEND)) return EPERM; - if (kind == _ACL_TYPE_DEFAULT && !VN_ISDIR(vp)) + if (kind == _ACL_TYPE_DEFAULT && !S_ISDIR(vp->i_mode)) return ENOTDIR; if (vp->i_sb->s_flags & MS_RDONLY) return EROFS; @@ -719,7 +719,7 @@ xfs_acl_inherit( * If the new file is a directory, its default ACL is a copy of * the containing directory's default ACL. */ - if (VN_ISDIR(vp)) + if (S_ISDIR(vp->i_mode)) xfs_acl_set_attr(vp, pdaclp, _ACL_TYPE_DEFAULT, &error); if (!error && !basicperms) xfs_acl_set_attr(vp, cacl, _ACL_TYPE_ACCESS, &error); diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c index 6650601c64f..3fef54b1158 100644 --- a/fs/xfs/xfs_vnodeops.c +++ b/fs/xfs/xfs_vnodeops.c @@ -211,7 +211,6 @@ xfs_setattr( int flags, cred_t *credp) { - bhv_vnode_t *vp = XFS_ITOV(ip); xfs_mount_t *mp = ip->i_mount; xfs_trans_t *tp; int mask; @@ -222,7 +221,6 @@ xfs_setattr( gid_t gid=0, igid=0; int timeflags = 0; xfs_prid_t projid=0, iprojid=0; - int mandlock_before, mandlock_after; struct xfs_dquot *udqp, *gdqp, *olddquot1, *olddquot2; int file_owner; int need_iolock = 1; @@ -383,7 +381,7 @@ xfs_setattr( m |= S_ISGID; #if 0 /* Linux allows this, Irix doesn't. */ - if ((vap->va_mode & S_ISVTX) && !VN_ISDIR(vp)) + if ((vap->va_mode & S_ISVTX) && !S_ISDIR(ip->i_d.di_mode)) m |= S_ISVTX; #endif if (m && !capable(CAP_FSETID)) @@ -461,10 +459,10 @@ xfs_setattr( goto error_return; } - if (VN_ISDIR(vp)) { + if (S_ISDIR(ip->i_d.di_mode)) { code = XFS_ERROR(EISDIR); goto error_return; - } else if (!VN_ISREG(vp)) { + } else if (!S_ISREG(ip->i_d.di_mode)) { code = XFS_ERROR(EINVAL); goto error_return; } @@ -626,9 +624,6 @@ xfs_setattr( xfs_trans_ihold(tp, ip); } - /* determine whether mandatory locking mode changes */ - mandlock_before = MANDLOCK(vp, ip->i_d.di_mode); - /* * Truncate file. Must have write permission and not be a directory. */ @@ -858,13 +853,6 @@ xfs_setattr( code = xfs_trans_commit(tp, commit_flags); } - /* - * If the (regular) file's mandatory locking mode changed, then - * notify the vnode. We do this under the inode lock to prevent - * racing calls to vop_vnode_change. - */ - mandlock_after = MANDLOCK(vp, ip->i_d.di_mode); - xfs_iunlock(ip, lock_flags); /* @@ -1491,7 +1479,7 @@ xfs_release( xfs_mount_t *mp = ip->i_mount; int error; - if (!VN_ISREG(vp) || (ip->i_d.di_mode == 0)) + if (!S_ISREG(ip->i_d.di_mode) || (ip->i_d.di_mode == 0)) return 0; /* If this is a read-only mount, don't do this (would generate I/O) */ -- cgit v1.2.3-70-g09d2 From 4e5dbb3498e74514b9936d691413afc55fb84ea9 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 22 Apr 2008 17:33:33 +1000 Subject: [XFS] kill xfs_getattr It's currently used by the ACL code to read di_mode/di_uid, but these are simple 32bit scalar values we can just read directly without locking. SGI-PV: 976035 SGI-Modid: xfs-linux-melb:xfs-kern:30897a Signed-off-by: Christoph Hellwig Signed-off-by: Lachlan McIlroy --- fs/xfs/xfs_acl.c | 40 +++------------- fs/xfs/xfs_vnodeops.c | 126 -------------------------------------------------- fs/xfs/xfs_vnodeops.h | 1 - 3 files changed, 7 insertions(+), 160 deletions(-) (limited to 'fs') diff --git a/fs/xfs/xfs_acl.c b/fs/xfs/xfs_acl.c index b1275cc4561..796e76ef271 100644 --- a/fs/xfs/xfs_acl.c +++ b/fs/xfs/xfs_acl.c @@ -238,15 +238,8 @@ xfs_acl_vget( error = EINVAL; goto out; } - if (kind == _ACL_TYPE_ACCESS) { - bhv_vattr_t va; - - va.va_mask = XFS_AT_MODE; - error = xfs_getattr(xfs_vtoi(vp), &va, 0); - if (error) - goto out; - xfs_acl_sync_mode(va.va_mode, xfs_acl); - } + if (kind == _ACL_TYPE_ACCESS) + xfs_acl_sync_mode(xfs_vtoi(vp)->i_d.di_mode, xfs_acl); error = -posix_acl_xfs_to_xattr(xfs_acl, ext_acl, size); } out: @@ -373,23 +366,15 @@ xfs_acl_allow_set( bhv_vnode_t *vp, int kind) { - xfs_inode_t *ip = xfs_vtoi(vp); - bhv_vattr_t va; - int error; - if (vp->i_flags & (S_IMMUTABLE|S_APPEND)) return EPERM; if (kind == _ACL_TYPE_DEFAULT && !S_ISDIR(vp->i_mode)) return ENOTDIR; if (vp->i_sb->s_flags & MS_RDONLY) return EROFS; - va.va_mask = XFS_AT_UID; - error = xfs_getattr(ip, &va, 0); - if (error) - return error; - if (va.va_uid != current->fsuid && !capable(CAP_FOWNER)) + if (xfs_vtoi(vp)->i_d.di_uid != current->fsuid && !capable(CAP_FOWNER)) return EPERM; - return error; + return 0; } /* @@ -643,7 +628,6 @@ xfs_acl_vtoacl( xfs_acl_t *access_acl, xfs_acl_t *default_acl) { - bhv_vattr_t va; int error = 0; if (access_acl) { @@ -652,16 +636,10 @@ xfs_acl_vtoacl( * be obtained for some reason, invalidate the access ACL. */ xfs_acl_get_attr(vp, access_acl, _ACL_TYPE_ACCESS, 0, &error); - if (!error) { - /* Got the ACL, need the mode... */ - va.va_mask = XFS_AT_MODE; - error = xfs_getattr(xfs_vtoi(vp), &va, 0); - } - if (error) access_acl->acl_cnt = XFS_ACL_NOT_PRESENT; else /* We have a good ACL and the file mode, synchronize. */ - xfs_acl_sync_mode(va.va_mode, access_acl); + xfs_acl_sync_mode(xfs_vtoi(vp)->i_d.di_mode, access_acl); } if (default_acl) { @@ -744,7 +722,7 @@ xfs_acl_setmode( bhv_vattr_t va; xfs_acl_entry_t *ap; xfs_acl_entry_t *gap = NULL; - int i, error, nomask = 1; + int i, nomask = 1; *basicperms = 1; @@ -756,11 +734,7 @@ xfs_acl_setmode( * mode. The m:: bits take precedence over the g:: bits. */ va.va_mask = XFS_AT_MODE; - error = xfs_getattr(xfs_vtoi(vp), &va, 0); - if (error) - return error; - - va.va_mask = XFS_AT_MODE; + va.va_mode = xfs_vtoi(vp)->i_d.di_mode; va.va_mode &= ~(S_IRWXU|S_IRWXG|S_IRWXO); ap = acl->acl_entry; for (i = 0; i < acl->acl_cnt; ++i) { diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c index 3fef54b1158..04f3e302fee 100644 --- a/fs/xfs/xfs_vnodeops.c +++ b/fs/xfs/xfs_vnodeops.c @@ -75,132 +75,6 @@ xfs_open( return 0; } -/* - * xfs_getattr - */ -int -xfs_getattr( - xfs_inode_t *ip, - bhv_vattr_t *vap, - int flags) -{ - bhv_vnode_t *vp = XFS_ITOV(ip); - xfs_mount_t *mp = ip->i_mount; - - xfs_itrace_entry(ip); - - if (XFS_FORCED_SHUTDOWN(mp)) - return XFS_ERROR(EIO); - - if (!(flags & ATTR_LAZY)) - xfs_ilock(ip, XFS_ILOCK_SHARED); - - vap->va_size = XFS_ISIZE(ip); - if (vap->va_mask == XFS_AT_SIZE) - goto all_done; - - vap->va_nblocks = - XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); - vap->va_nodeid = ip->i_ino; -#if XFS_BIG_INUMS - vap->va_nodeid += mp->m_inoadd; -#endif - vap->va_nlink = ip->i_d.di_nlink; - - /* - * Quick exit for non-stat callers - */ - if ((vap->va_mask & - ~(XFS_AT_SIZE|XFS_AT_FSID|XFS_AT_NODEID| - XFS_AT_NLINK|XFS_AT_BLKSIZE)) == 0) - goto all_done; - - /* - * Copy from in-core inode. - */ - vap->va_mode = ip->i_d.di_mode; - vap->va_uid = ip->i_d.di_uid; - vap->va_gid = ip->i_d.di_gid; - vap->va_projid = ip->i_d.di_projid; - - /* - * Check vnode type block/char vs. everything else. - */ - switch (ip->i_d.di_mode & S_IFMT) { - case S_IFBLK: - case S_IFCHR: - vap->va_rdev = ip->i_df.if_u2.if_rdev; - vap->va_blocksize = BLKDEV_IOSIZE; - break; - default: - vap->va_rdev = 0; - - if (!(XFS_IS_REALTIME_INODE(ip))) { - vap->va_blocksize = xfs_preferred_iosize(mp); - } else { - - /* - * If the file blocks are being allocated from a - * realtime partition, then return the inode's - * realtime extent size or the realtime volume's - * extent size. - */ - vap->va_blocksize = - xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog; - } - break; - } - - vn_atime_to_timespec(vp, &vap->va_atime); - vap->va_mtime.tv_sec = ip->i_d.di_mtime.t_sec; - vap->va_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec; - vap->va_ctime.tv_sec = ip->i_d.di_ctime.t_sec; - vap->va_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec; - - /* - * Exit for stat callers. See if any of the rest of the fields - * to be filled in are needed. - */ - if ((vap->va_mask & - (XFS_AT_XFLAGS|XFS_AT_EXTSIZE|XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS| - XFS_AT_GENCOUNT|XFS_AT_VCODE)) == 0) - goto all_done; - - /* - * Convert di_flags to xflags. - */ - vap->va_xflags = xfs_ip2xflags(ip); - - /* - * Exit for inode revalidate. See if any of the rest of - * the fields to be filled in are needed. - */ - if ((vap->va_mask & - (XFS_AT_EXTSIZE|XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS| - XFS_AT_GENCOUNT|XFS_AT_VCODE)) == 0) - goto all_done; - - vap->va_extsize = ip->i_d.di_extsize << mp->m_sb.sb_blocklog; - vap->va_nextents = - (ip->i_df.if_flags & XFS_IFEXTENTS) ? - ip->i_df.if_bytes / sizeof(xfs_bmbt_rec_t) : - ip->i_d.di_nextents; - if (ip->i_afp) - vap->va_anextents = - (ip->i_afp->if_flags & XFS_IFEXTENTS) ? - ip->i_afp->if_bytes / sizeof(xfs_bmbt_rec_t) : - ip->i_d.di_anextents; - else - vap->va_anextents = 0; - vap->va_gen = ip->i_d.di_gen; - - all_done: - if (!(flags & ATTR_LAZY)) - xfs_iunlock(ip, XFS_ILOCK_SHARED); - return 0; -} - - /* * xfs_setattr */ diff --git a/fs/xfs/xfs_vnodeops.h b/fs/xfs/xfs_vnodeops.h index 24c53923dc2..6b66904a383 100644 --- a/fs/xfs/xfs_vnodeops.h +++ b/fs/xfs/xfs_vnodeops.h @@ -15,7 +15,6 @@ struct xfs_iomap; int xfs_open(struct xfs_inode *ip); -int xfs_getattr(struct xfs_inode *ip, struct bhv_vattr *vap, int flags); int xfs_setattr(struct xfs_inode *ip, struct bhv_vattr *vap, int flags, struct cred *credp); int xfs_readlink(struct xfs_inode *ip, char *link); -- cgit v1.2.3-70-g09d2 From 6a7f422d47d4af461704ebb9d7a389d9e59766b2 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 22 Apr 2008 17:33:40 +1000 Subject: [XFS] kill di_mode checks after xfs_iget Unless XFS_IGET_CREATE is passed xfs_iget will return ENOENT if it encounters an inode with di_mode == 0. Remove the duplicated checks in the callers. (the log recovery case is not touched for now) SGI-PV: 976035 SGI-Modid: xfs-linux-melb:xfs-kern:30898a Signed-off-by: Christoph Hellwig Signed-off-by: Lachlan McIlroy --- fs/xfs/linux-2.6/xfs_export.c | 2 +- fs/xfs/linux-2.6/xfs_ioctl.c | 2 +- fs/xfs/quota/xfs_qm.c | 6 ------ fs/xfs/quota/xfs_qm_syscalls.c | 6 ------ fs/xfs/xfs_itable.c | 6 ------ 5 files changed, 2 insertions(+), 20 deletions(-) (limited to 'fs') diff --git a/fs/xfs/linux-2.6/xfs_export.c b/fs/xfs/linux-2.6/xfs_export.c index 265f0168ab7..c672b3238b1 100644 --- a/fs/xfs/linux-2.6/xfs_export.c +++ b/fs/xfs/linux-2.6/xfs_export.c @@ -133,7 +133,7 @@ xfs_nfs_get_inode( if (!ip) return ERR_PTR(-EIO); - if (!ip->i_d.di_mode || ip->i_d.di_gen != generation) { + if (ip->i_d.di_gen != generation) { xfs_iput_new(ip, XFS_ILOCK_SHARED); return ERR_PTR(-ENOENT); } diff --git a/fs/xfs/linux-2.6/xfs_ioctl.c b/fs/xfs/linux-2.6/xfs_ioctl.c index 4ddb86b73c6..98e87804991 100644 --- a/fs/xfs/linux-2.6/xfs_ioctl.c +++ b/fs/xfs/linux-2.6/xfs_ioctl.c @@ -238,7 +238,7 @@ xfs_vget_fsop_handlereq( return error; if (ip == NULL) return XFS_ERROR(EIO); - if (ip->i_d.di_mode == 0 || ip->i_d.di_gen != igen) { + if (ip->i_d.di_gen != igen) { xfs_iput_new(ip, XFS_ILOCK_SHARED); return XFS_ERROR(ENOENT); } diff --git a/fs/xfs/quota/xfs_qm.c b/fs/xfs/quota/xfs_qm.c index 40ea5640956..fb624a17f15 100644 --- a/fs/xfs/quota/xfs_qm.c +++ b/fs/xfs/quota/xfs_qm.c @@ -1737,12 +1737,6 @@ xfs_qm_dqusage_adjust( return error; } - if (ip->i_d.di_mode == 0) { - xfs_iput_new(ip, XFS_ILOCK_EXCL); - *res = BULKSTAT_RV_NOTHING; - return XFS_ERROR(ENOENT); - } - /* * Obtain the locked dquots. In case of an error (eg. allocation * fails for ENOSPC), we return the negative of the error number diff --git a/fs/xfs/quota/xfs_qm_syscalls.c b/fs/xfs/quota/xfs_qm_syscalls.c index 8342823dbdc..768a3b27d2b 100644 --- a/fs/xfs/quota/xfs_qm_syscalls.c +++ b/fs/xfs/quota/xfs_qm_syscalls.c @@ -1366,12 +1366,6 @@ xfs_qm_internalqcheck_adjust( return (error); } - if (ip->i_d.di_mode == 0) { - xfs_iput_new(ip, lock_flags); - *res = BULKSTAT_RV_NOTHING; - return XFS_ERROR(ENOENT); - } - /* * This inode can have blocks after eof which can get released * when we send it to inactive. Since we don't check the dquot diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c index eb85bdedad0..419de15aeb4 100644 --- a/fs/xfs/xfs_itable.c +++ b/fs/xfs/xfs_itable.c @@ -71,11 +71,6 @@ xfs_bulkstat_one_iget( ASSERT(ip != NULL); ASSERT(ip->i_blkno != (xfs_daddr_t)0); - if (ip->i_d.di_mode == 0) { - *stat = BULKSTAT_RV_NOTHING; - error = XFS_ERROR(ENOENT); - goto out_iput; - } vp = XFS_ITOV(ip); dic = &ip->i_d; @@ -124,7 +119,6 @@ xfs_bulkstat_one_iget( break; } - out_iput: xfs_iput(ip, XFS_ILOCK_SHARED); return error; } -- cgit v1.2.3-70-g09d2 From d4377d84189349357e1812eaff6d0504766eea06 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 22 Apr 2008 17:33:46 +1000 Subject: [XFS] xfs_rename: pass resblks to xfs_dir_removename Similar to rmdir and remove - avoids a potential transaction reservation overrun. SGI-PV: 976035 SGI-Modid: xfs-linux-melb:xfs-kern:30900a Signed-off-by: Christoph Hellwig Signed-off-by: Lachlan McIlroy --- fs/xfs/xfs_vnodeops.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs') diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c index 04f3e302fee..7093d749589 100644 --- a/fs/xfs/xfs_vnodeops.c +++ b/fs/xfs/xfs_vnodeops.c @@ -2241,7 +2241,7 @@ xfs_remove( */ XFS_BMAP_INIT(&free_list, &first_block); error = xfs_dir_removename(tp, dp, name, ip->i_ino, - &first_block, &free_list, 0); + &first_block, &free_list, resblks); if (error) { ASSERT(error != ENOENT); REMOVE_DEBUG_TRACE(__LINE__); -- cgit v1.2.3-70-g09d2 From eca450b7c23f804597b87085b2a05bfc5b3ccb8b Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 22 Apr 2008 17:33:52 +1000 Subject: [XFS] simplify xfs_lookup Opencode xfs-kill-xfs_dir_lookup_int here, which gets rid of a lock roundtrip, and lots of stack space. Also kill the di_mode == 0 check that has been done in xfs_iget for a few years now. SGI-PV: 976035 SGI-Modid: xfs-linux-melb:xfs-kern:30901a Signed-off-by: Christoph Hellwig Signed-off-by: Lachlan McIlroy --- fs/xfs/xfs_vnodeops.c | 22 +++++++++++++++------- 1 file changed, 15 insertions(+), 7 deletions(-) (limited to 'fs') diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c index 7093d749589..637fc1a2bb4 100644 --- a/fs/xfs/xfs_vnodeops.c +++ b/fs/xfs/xfs_vnodeops.c @@ -1636,8 +1636,7 @@ xfs_lookup( struct xfs_name *name, xfs_inode_t **ipp) { - xfs_inode_t *ip; - xfs_ino_t e_inum; + xfs_ino_t inum; int error; uint lock_mode; @@ -1647,12 +1646,21 @@ xfs_lookup( return XFS_ERROR(EIO); lock_mode = xfs_ilock_map_shared(dp); - error = xfs_dir_lookup_int(dp, lock_mode, name, &e_inum, &ip); - if (!error) { - *ipp = ip; - xfs_itrace_ref(ip); - } + error = xfs_dir_lookup(NULL, dp, name, &inum); xfs_iunlock_map_shared(dp, lock_mode); + + if (error) + goto out; + + error = xfs_iget(dp->i_mount, NULL, inum, 0, 0, ipp, 0); + if (error) + goto out; + + xfs_itrace_ref(*ipp); + return 0; + + out: + *ipp = NULL; return error; } -- cgit v1.2.3-70-g09d2 From 579aa9caf552c639fc78168db4cfe7ffcf00c3b3 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 22 Apr 2008 17:34:00 +1000 Subject: [XFS] shrink mrlock_t The writer field is not needed for non_DEBU builds so remove it. While we're at i also clean up the interface for is locked asserts to go through and xfs_iget.c helper with an interface like the xfs_ilock routines to isolated the XFS codebase from mrlock internals. That way we can kill mrlock_t entirely once rw_semaphores grow an islocked facility. Also remove unused flags to the ilock family of functions. SGI-PV: 976035 SGI-Modid: xfs-linux-melb:xfs-kern:30902a Signed-off-by: Christoph Hellwig Signed-off-by: Lachlan McIlroy --- fs/xfs/linux-2.6/mrlock.h | 60 +++++++----------- fs/xfs/linux-2.6/xfs_lrw.c | 21 +++---- fs/xfs/quota/xfs_dquot.c | 4 +- fs/xfs/quota/xfs_qm.c | 21 ++++--- fs/xfs/quota/xfs_quota_priv.h | 5 -- fs/xfs/quota/xfs_trans_dquot.c | 2 +- fs/xfs/xfs_bmap.c | 1 - fs/xfs/xfs_iget.c | 140 ++++++++++++++++++++++------------------- fs/xfs/xfs_inode.c | 25 ++++---- fs/xfs/xfs_inode.h | 14 +---- fs/xfs/xfs_inode_item.c | 12 ++-- fs/xfs/xfs_iomap.c | 6 +- fs/xfs/xfs_trans_inode.c | 12 ++-- fs/xfs/xfs_utils.c | 2 +- fs/xfs/xfs_vnodeops.c | 4 +- 15 files changed, 154 insertions(+), 175 deletions(-) (limited to 'fs') diff --git a/fs/xfs/linux-2.6/mrlock.h b/fs/xfs/linux-2.6/mrlock.h index c110bb00266..ff6a19873e5 100644 --- a/fs/xfs/linux-2.6/mrlock.h +++ b/fs/xfs/linux-2.6/mrlock.h @@ -20,29 +20,24 @@ #include -enum { MR_NONE, MR_ACCESS, MR_UPDATE }; - typedef struct { struct rw_semaphore mr_lock; +#ifdef DEBUG int mr_writer; +#endif } mrlock_t; +#ifdef DEBUG #define mrinit(mrp, name) \ do { (mrp)->mr_writer = 0; init_rwsem(&(mrp)->mr_lock); } while (0) +#else +#define mrinit(mrp, name) \ + do { init_rwsem(&(mrp)->mr_lock); } while (0) +#endif + #define mrlock_init(mrp, t,n,s) mrinit(mrp, n) #define mrfree(mrp) do { } while (0) -static inline void mraccess(mrlock_t *mrp) -{ - down_read(&mrp->mr_lock); -} - -static inline void mrupdate(mrlock_t *mrp) -{ - down_write(&mrp->mr_lock); - mrp->mr_writer = 1; -} - static inline void mraccess_nested(mrlock_t *mrp, int subclass) { down_read_nested(&mrp->mr_lock, subclass); @@ -51,10 +46,11 @@ static inline void mraccess_nested(mrlock_t *mrp, int subclass) static inline void mrupdate_nested(mrlock_t *mrp, int subclass) { down_write_nested(&mrp->mr_lock, subclass); +#ifdef DEBUG mrp->mr_writer = 1; +#endif } - static inline int mrtryaccess(mrlock_t *mrp) { return down_read_trylock(&mrp->mr_lock); @@ -64,39 +60,31 @@ static inline int mrtryupdate(mrlock_t *mrp) { if (!down_write_trylock(&mrp->mr_lock)) return 0; +#ifdef DEBUG mrp->mr_writer = 1; +#endif return 1; } -static inline void mrunlock(mrlock_t *mrp) +static inline void mrunlock_excl(mrlock_t *mrp) { - if (mrp->mr_writer) { - mrp->mr_writer = 0; - up_write(&mrp->mr_lock); - } else { - up_read(&mrp->mr_lock); - } +#ifdef DEBUG + mrp->mr_writer = 0; +#endif + up_write(&mrp->mr_lock); } -static inline void mrdemote(mrlock_t *mrp) +static inline void mrunlock_shared(mrlock_t *mrp) { - mrp->mr_writer = 0; - downgrade_write(&mrp->mr_lock); + up_read(&mrp->mr_lock); } -#ifdef DEBUG -/* - * Debug-only routine, without some platform-specific asm code, we can - * now only answer requests regarding whether we hold the lock for write - * (reader state is outside our visibility, we only track writer state). - * Note: means !ismrlocked would give false positives, so don't do that. - */ -static inline int ismrlocked(mrlock_t *mrp, int type) +static inline void mrdemote(mrlock_t *mrp) { - if (mrp && type == MR_UPDATE) - return mrp->mr_writer; - return 1; -} +#ifdef DEBUG + mrp->mr_writer = 0; #endif + downgrade_write(&mrp->mr_lock); +} #endif /* __XFS_SUPPORT_MRLOCK_H__ */ diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c index 1ebd8004469..5e3b57516ec 100644 --- a/fs/xfs/linux-2.6/xfs_lrw.c +++ b/fs/xfs/linux-2.6/xfs_lrw.c @@ -394,7 +394,7 @@ xfs_zero_last_block( int error = 0; xfs_bmbt_irec_t imap; - ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE) != 0); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); zero_offset = XFS_B_FSB_OFFSET(mp, isize); if (zero_offset == 0) { @@ -425,14 +425,14 @@ xfs_zero_last_block( * out sync. We need to drop the ilock while we do this so we * don't deadlock when the buffer cache calls back to us. */ - xfs_iunlock(ip, XFS_ILOCK_EXCL| XFS_EXTSIZE_RD); + xfs_iunlock(ip, XFS_ILOCK_EXCL); zero_len = mp->m_sb.sb_blocksize - zero_offset; if (isize + zero_len > offset) zero_len = offset - isize; error = xfs_iozero(ip, isize, zero_len); - xfs_ilock(ip, XFS_ILOCK_EXCL|XFS_EXTSIZE_RD); + xfs_ilock(ip, XFS_ILOCK_EXCL); ASSERT(error >= 0); return error; } @@ -465,8 +465,7 @@ xfs_zero_eof( int error = 0; xfs_bmbt_irec_t imap; - ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE)); - ASSERT(ismrlocked(&ip->i_iolock, MR_UPDATE)); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_IOLOCK_EXCL)); ASSERT(offset > isize); /* @@ -475,8 +474,7 @@ xfs_zero_eof( */ error = xfs_zero_last_block(ip, offset, isize); if (error) { - ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE)); - ASSERT(ismrlocked(&ip->i_iolock, MR_UPDATE)); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_IOLOCK_EXCL)); return error; } @@ -507,8 +505,7 @@ xfs_zero_eof( error = xfs_bmapi(NULL, ip, start_zero_fsb, zero_count_fsb, 0, NULL, 0, &imap, &nimaps, NULL, NULL); if (error) { - ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE)); - ASSERT(ismrlocked(&ip->i_iolock, MR_UPDATE)); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_IOLOCK_EXCL)); return error; } ASSERT(nimaps > 0); @@ -532,7 +529,7 @@ xfs_zero_eof( * Drop the inode lock while we're doing the I/O. * We'll still have the iolock to protect us. */ - xfs_iunlock(ip, XFS_ILOCK_EXCL|XFS_EXTSIZE_RD); + xfs_iunlock(ip, XFS_ILOCK_EXCL); zero_off = XFS_FSB_TO_B(mp, start_zero_fsb); zero_len = XFS_FSB_TO_B(mp, imap.br_blockcount); @@ -548,13 +545,13 @@ xfs_zero_eof( start_zero_fsb = imap.br_startoff + imap.br_blockcount; ASSERT(start_zero_fsb <= (end_zero_fsb + 1)); - xfs_ilock(ip, XFS_ILOCK_EXCL|XFS_EXTSIZE_RD); + xfs_ilock(ip, XFS_ILOCK_EXCL); } return 0; out_lock: - xfs_ilock(ip, XFS_ILOCK_EXCL|XFS_EXTSIZE_RD); + xfs_ilock(ip, XFS_ILOCK_EXCL); ASSERT(error >= 0); return error; } diff --git a/fs/xfs/quota/xfs_dquot.c b/fs/xfs/quota/xfs_dquot.c index 631ebb31b29..85df3288efd 100644 --- a/fs/xfs/quota/xfs_dquot.c +++ b/fs/xfs/quota/xfs_dquot.c @@ -933,7 +933,7 @@ xfs_qm_dqget( type == XFS_DQ_PROJ || type == XFS_DQ_GROUP); if (ip) { - ASSERT(XFS_ISLOCKED_INODE_EXCL(ip)); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); if (type == XFS_DQ_USER) ASSERT(ip->i_udquot == NULL); else @@ -1088,7 +1088,7 @@ xfs_qm_dqget( xfs_qm_mplist_unlock(mp); XFS_DQ_HASH_UNLOCK(h); dqret: - ASSERT((ip == NULL) || XFS_ISLOCKED_INODE_EXCL(ip)); + ASSERT((ip == NULL) || xfs_isilocked(ip, XFS_ILOCK_EXCL)); xfs_dqtrace_entry(dqp, "DQGET DONE"); *O_dqpp = dqp; return (0); diff --git a/fs/xfs/quota/xfs_qm.c b/fs/xfs/quota/xfs_qm.c index fb624a17f15..d31cce1165c 100644 --- a/fs/xfs/quota/xfs_qm.c +++ b/fs/xfs/quota/xfs_qm.c @@ -670,7 +670,7 @@ xfs_qm_dqattach_one( xfs_dquot_t *dqp; int error; - ASSERT(XFS_ISLOCKED_INODE_EXCL(ip)); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); error = 0; /* * See if we already have it in the inode itself. IO_idqpp is @@ -874,7 +874,7 @@ xfs_qm_dqattach( return 0; ASSERT((flags & XFS_QMOPT_ILOCKED) == 0 || - XFS_ISLOCKED_INODE_EXCL(ip)); + xfs_isilocked(ip, XFS_ILOCK_EXCL)); if (! (flags & XFS_QMOPT_ILOCKED)) xfs_ilock(ip, XFS_ILOCK_EXCL); @@ -888,7 +888,8 @@ xfs_qm_dqattach( goto done; nquotas++; } - ASSERT(XFS_ISLOCKED_INODE_EXCL(ip)); + + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); if (XFS_IS_OQUOTA_ON(mp)) { error = XFS_IS_GQUOTA_ON(mp) ? xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP, @@ -913,7 +914,7 @@ xfs_qm_dqattach( * This WON'T, in general, result in a thrash. */ if (nquotas == 2) { - ASSERT(XFS_ISLOCKED_INODE_EXCL(ip)); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); ASSERT(ip->i_udquot); ASSERT(ip->i_gdquot); @@ -956,7 +957,7 @@ xfs_qm_dqattach( #ifdef QUOTADEBUG else - ASSERT(XFS_ISLOCKED_INODE_EXCL(ip)); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); #endif return error; } @@ -1291,7 +1292,7 @@ xfs_qm_dqget_noattach( xfs_mount_t *mp; xfs_dquot_t *udqp, *gdqp; - ASSERT(XFS_ISLOCKED_INODE_EXCL(ip)); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); mp = ip->i_mount; udqp = NULL; gdqp = NULL; @@ -1392,7 +1393,7 @@ xfs_qm_qino_alloc( * Keep an extra reference to this quota inode. This inode is * locked exclusively and joined to the transaction already. */ - ASSERT(XFS_ISLOCKED_INODE_EXCL(*ip)); + ASSERT(xfs_isilocked(*ip, XFS_ILOCK_EXCL)); VN_HOLD(XFS_ITOV((*ip))); /* @@ -2557,7 +2558,7 @@ xfs_qm_vop_chown( uint bfield = XFS_IS_REALTIME_INODE(ip) ? XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT; - ASSERT(XFS_ISLOCKED_INODE_EXCL(ip)); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount)); /* old dquot */ @@ -2601,7 +2602,7 @@ xfs_qm_vop_chown_reserve( uint delblks, blkflags, prjflags = 0; xfs_dquot_t *unresudq, *unresgdq, *delblksudq, *delblksgdq; - ASSERT(XFS_ISLOCKED_INODE(ip)); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); mp = ip->i_mount; ASSERT(XFS_IS_QUOTA_RUNNING(mp)); @@ -2711,7 +2712,7 @@ xfs_qm_vop_dqattach_and_dqmod_newinode( if (!XFS_IS_QUOTA_ON(tp->t_mountp)) return; - ASSERT(XFS_ISLOCKED_INODE_EXCL(ip)); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); ASSERT(XFS_IS_QUOTA_RUNNING(tp->t_mountp)); if (udqp) { diff --git a/fs/xfs/quota/xfs_quota_priv.h b/fs/xfs/quota/xfs_quota_priv.h index a8b85e2be9d..5e4a40b1c56 100644 --- a/fs/xfs/quota/xfs_quota_priv.h +++ b/fs/xfs/quota/xfs_quota_priv.h @@ -27,11 +27,6 @@ /* Number of dquots that fit in to a dquot block */ #define XFS_QM_DQPERBLK(mp) ((mp)->m_quotainfo->qi_dqperchunk) -#define XFS_ISLOCKED_INODE(ip) (ismrlocked(&(ip)->i_lock, \ - MR_UPDATE | MR_ACCESS) != 0) -#define XFS_ISLOCKED_INODE_EXCL(ip) (ismrlocked(&(ip)->i_lock, \ - MR_UPDATE) != 0) - #define XFS_DQ_IS_ADDEDTO_TRX(t, d) ((d)->q_transp == (t)) #define XFS_QI_MPLRECLAIMS(mp) ((mp)->m_quotainfo->qi_dqreclaims) diff --git a/fs/xfs/quota/xfs_trans_dquot.c b/fs/xfs/quota/xfs_trans_dquot.c index f441f836ca8..99611381e74 100644 --- a/fs/xfs/quota/xfs_trans_dquot.c +++ b/fs/xfs/quota/xfs_trans_dquot.c @@ -834,7 +834,7 @@ xfs_trans_reserve_quota_nblks( ASSERT(ip->i_ino != mp->m_sb.sb_uquotino); ASSERT(ip->i_ino != mp->m_sb.sb_gquotino); - ASSERT(XFS_ISLOCKED_INODE_EXCL(ip)); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount)); ASSERT((flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) == XFS_TRANS_DQ_RES_RTBLKS || diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c index eb198c01c35..53c259f5a5a 100644 --- a/fs/xfs/xfs_bmap.c +++ b/fs/xfs/xfs_bmap.c @@ -4074,7 +4074,6 @@ xfs_bmap_add_attrfork( error2: xfs_bmap_cancel(&flist); error1: - ASSERT(ismrlocked(&ip->i_lock,MR_UPDATE)); xfs_iunlock(ip, XFS_ILOCK_EXCL); error0: xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c index e657c512846..b07604b94d9 100644 --- a/fs/xfs/xfs_iget.c +++ b/fs/xfs/xfs_iget.c @@ -593,8 +593,9 @@ xfs_iunlock_map_shared( * XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL */ void -xfs_ilock(xfs_inode_t *ip, - uint lock_flags) +xfs_ilock( + xfs_inode_t *ip, + uint lock_flags) { /* * You can't set both SHARED and EXCL for the same lock, @@ -607,16 +608,16 @@ xfs_ilock(xfs_inode_t *ip, (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_DEP_MASK)) == 0); - if (lock_flags & XFS_IOLOCK_EXCL) { + if (lock_flags & XFS_IOLOCK_EXCL) mrupdate_nested(&ip->i_iolock, XFS_IOLOCK_DEP(lock_flags)); - } else if (lock_flags & XFS_IOLOCK_SHARED) { + else if (lock_flags & XFS_IOLOCK_SHARED) mraccess_nested(&ip->i_iolock, XFS_IOLOCK_DEP(lock_flags)); - } - if (lock_flags & XFS_ILOCK_EXCL) { + + if (lock_flags & XFS_ILOCK_EXCL) mrupdate_nested(&ip->i_lock, XFS_ILOCK_DEP(lock_flags)); - } else if (lock_flags & XFS_ILOCK_SHARED) { + else if (lock_flags & XFS_ILOCK_SHARED) mraccess_nested(&ip->i_lock, XFS_ILOCK_DEP(lock_flags)); - } + xfs_ilock_trace(ip, 1, lock_flags, (inst_t *)__return_address); } @@ -631,15 +632,12 @@ xfs_ilock(xfs_inode_t *ip, * lock_flags -- this parameter indicates the inode's locks to be * to be locked. See the comment for xfs_ilock() for a list * of valid values. - * */ int -xfs_ilock_nowait(xfs_inode_t *ip, - uint lock_flags) +xfs_ilock_nowait( + xfs_inode_t *ip, + uint lock_flags) { - int iolocked; - int ilocked; - /* * You can't set both SHARED and EXCL for the same lock, * and only XFS_IOLOCK_SHARED, XFS_IOLOCK_EXCL, XFS_ILOCK_SHARED, @@ -651,37 +649,30 @@ xfs_ilock_nowait(xfs_inode_t *ip, (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); ASSERT((lock_flags & ~(XFS_LOCK_MASK | XFS_LOCK_DEP_MASK)) == 0); - iolocked = 0; if (lock_flags & XFS_IOLOCK_EXCL) { - iolocked = mrtryupdate(&ip->i_iolock); - if (!iolocked) { - return 0; - } + if (!mrtryupdate(&ip->i_iolock)) + goto out; } else if (lock_flags & XFS_IOLOCK_SHARED) { - iolocked = mrtryaccess(&ip->i_iolock); - if (!iolocked) { - return 0; - } + if (!mrtryaccess(&ip->i_iolock)) + goto out; } if (lock_flags & XFS_ILOCK_EXCL) { - ilocked = mrtryupdate(&ip->i_lock); - if (!ilocked) { - if (iolocked) { - mrunlock(&ip->i_iolock); - } - return 0; - } + if (!mrtryupdate(&ip->i_lock)) + goto out_undo_iolock; } else if (lock_flags & XFS_ILOCK_SHARED) { - ilocked = mrtryaccess(&ip->i_lock); - if (!ilocked) { - if (iolocked) { - mrunlock(&ip->i_iolock); - } - return 0; - } + if (!mrtryaccess(&ip->i_lock)) + goto out_undo_iolock; } xfs_ilock_trace(ip, 2, lock_flags, (inst_t *)__return_address); return 1; + + out_undo_iolock: + if (lock_flags & XFS_IOLOCK_EXCL) + mrunlock_excl(&ip->i_iolock); + else if (lock_flags & XFS_IOLOCK_SHARED) + mrunlock_shared(&ip->i_iolock); + out: + return 0; } /* @@ -697,8 +688,9 @@ xfs_ilock_nowait(xfs_inode_t *ip, * */ void -xfs_iunlock(xfs_inode_t *ip, - uint lock_flags) +xfs_iunlock( + xfs_inode_t *ip, + uint lock_flags) { /* * You can't set both SHARED and EXCL for the same lock, @@ -713,31 +705,25 @@ xfs_iunlock(xfs_inode_t *ip, XFS_LOCK_DEP_MASK)) == 0); ASSERT(lock_flags != 0); - if (lock_flags & (XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL)) { - ASSERT(!(lock_flags & XFS_IOLOCK_SHARED) || - (ismrlocked(&ip->i_iolock, MR_ACCESS))); - ASSERT(!(lock_flags & XFS_IOLOCK_EXCL) || - (ismrlocked(&ip->i_iolock, MR_UPDATE))); - mrunlock(&ip->i_iolock); - } + if (lock_flags & XFS_IOLOCK_EXCL) + mrunlock_excl(&ip->i_iolock); + else if (lock_flags & XFS_IOLOCK_SHARED) + mrunlock_shared(&ip->i_iolock); - if (lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) { - ASSERT(!(lock_flags & XFS_ILOCK_SHARED) || - (ismrlocked(&ip->i_lock, MR_ACCESS))); - ASSERT(!(lock_flags & XFS_ILOCK_EXCL) || - (ismrlocked(&ip->i_lock, MR_UPDATE))); - mrunlock(&ip->i_lock); + if (lock_flags & XFS_ILOCK_EXCL) + mrunlock_excl(&ip->i_lock); + else if (lock_flags & XFS_ILOCK_SHARED) + mrunlock_shared(&ip->i_lock); + if ((lock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)) && + !(lock_flags & XFS_IUNLOCK_NONOTIFY) && ip->i_itemp) { /* * Let the AIL know that this item has been unlocked in case * it is in the AIL and anyone is waiting on it. Don't do * this if the caller has asked us not to. */ - if (!(lock_flags & XFS_IUNLOCK_NONOTIFY) && - ip->i_itemp != NULL) { - xfs_trans_unlocked_item(ip->i_mount, - (xfs_log_item_t*)(ip->i_itemp)); - } + xfs_trans_unlocked_item(ip->i_mount, + (xfs_log_item_t*)(ip->i_itemp)); } xfs_ilock_trace(ip, 3, lock_flags, (inst_t *)__return_address); } @@ -747,21 +733,47 @@ xfs_iunlock(xfs_inode_t *ip, * if it is being demoted. */ void -xfs_ilock_demote(xfs_inode_t *ip, - uint lock_flags) +xfs_ilock_demote( + xfs_inode_t *ip, + uint lock_flags) { ASSERT(lock_flags & (XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL)); ASSERT((lock_flags & ~(XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL)) == 0); - if (lock_flags & XFS_ILOCK_EXCL) { - ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE)); + if (lock_flags & XFS_ILOCK_EXCL) mrdemote(&ip->i_lock); - } - if (lock_flags & XFS_IOLOCK_EXCL) { - ASSERT(ismrlocked(&ip->i_iolock, MR_UPDATE)); + if (lock_flags & XFS_IOLOCK_EXCL) mrdemote(&ip->i_iolock); +} + +#ifdef DEBUG +/* + * Debug-only routine, without additional rw_semaphore APIs, we can + * now only answer requests regarding whether we hold the lock for write + * (reader state is outside our visibility, we only track writer state). + * + * Note: this means !xfs_isilocked would give false positives, so don't do that. + */ +int +xfs_isilocked( + xfs_inode_t *ip, + uint lock_flags) +{ + if ((lock_flags & (XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)) == + XFS_ILOCK_EXCL) { + if (!ip->i_lock.mr_writer) + return 0; } + + if ((lock_flags & (XFS_IOLOCK_EXCL|XFS_IOLOCK_SHARED)) == + XFS_IOLOCK_EXCL) { + if (!ip->i_iolock.mr_writer) + return 0; + } + + return 1; } +#endif /* * The following three routines simply manage the i_flock diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index ca12acb9039..cf0bb9c1d62 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -1291,7 +1291,7 @@ xfs_file_last_byte( xfs_fileoff_t size_last_block; int error; - ASSERT(ismrlocked(&(ip->i_iolock), MR_UPDATE | MR_ACCESS)); + ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL|XFS_IOLOCK_SHARED)); mp = ip->i_mount; /* @@ -1402,7 +1402,7 @@ xfs_itruncate_start( bhv_vnode_t *vp; int error = 0; - ASSERT(ismrlocked(&ip->i_iolock, MR_UPDATE) != 0); + ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); ASSERT((new_size == 0) || (new_size <= ip->i_size)); ASSERT((flags == XFS_ITRUNC_DEFINITE) || (flags == XFS_ITRUNC_MAYBE)); @@ -1528,8 +1528,7 @@ xfs_itruncate_finish( xfs_bmap_free_t free_list; int error; - ASSERT(ismrlocked(&ip->i_iolock, MR_UPDATE) != 0); - ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE) != 0); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_IOLOCK_EXCL)); ASSERT((new_size == 0) || (new_size <= ip->i_size)); ASSERT(*tp != NULL); ASSERT((*tp)->t_flags & XFS_TRANS_PERM_LOG_RES); @@ -1780,8 +1779,7 @@ xfs_igrow_start( xfs_fsize_t new_size, cred_t *credp) { - ASSERT(ismrlocked(&(ip->i_lock), MR_UPDATE) != 0); - ASSERT(ismrlocked(&(ip->i_iolock), MR_UPDATE) != 0); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_IOLOCK_EXCL)); ASSERT(new_size > ip->i_size); /* @@ -1809,8 +1807,7 @@ xfs_igrow_finish( xfs_fsize_t new_size, int change_flag) { - ASSERT(ismrlocked(&(ip->i_lock), MR_UPDATE) != 0); - ASSERT(ismrlocked(&(ip->i_iolock), MR_UPDATE) != 0); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_IOLOCK_EXCL)); ASSERT(ip->i_transp == tp); ASSERT(new_size > ip->i_size); @@ -2287,7 +2284,7 @@ xfs_ifree( xfs_dinode_t *dip; xfs_buf_t *ibp; - ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE)); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); ASSERT(ip->i_transp == tp); ASSERT(ip->i_d.di_nlink == 0); ASSERT(ip->i_d.di_nextents == 0); @@ -2746,7 +2743,7 @@ void xfs_ipin( xfs_inode_t *ip) { - ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE)); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); atomic_inc(&ip->i_pincount); } @@ -2779,7 +2776,7 @@ __xfs_iunpin_wait( { xfs_inode_log_item_t *iip = ip->i_itemp; - ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE | MR_ACCESS)); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); if (atomic_read(&ip->i_pincount) == 0) return; @@ -2829,7 +2826,7 @@ xfs_iextents_copy( xfs_fsblock_t start_block; ifp = XFS_IFORK_PTR(ip, whichfork); - ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE|MR_ACCESS)); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); ASSERT(ifp->if_bytes > 0); nrecs = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); @@ -3132,7 +3129,7 @@ xfs_iflush( XFS_STATS_INC(xs_iflush_count); - ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE|MR_ACCESS)); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); ASSERT(issemalocked(&(ip->i_flock))); ASSERT(ip->i_d.di_format != XFS_DINODE_FMT_BTREE || ip->i_d.di_nextents > ip->i_df.if_ext_max); @@ -3297,7 +3294,7 @@ xfs_iflush_int( int first; #endif - ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE|MR_ACCESS)); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); ASSERT(issemalocked(&(ip->i_flock))); ASSERT(ip->i_d.di_format != XFS_DINODE_FMT_BTREE || ip->i_d.di_nextents > ip->i_df.if_ext_max); diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index 93c37697a72..877d71adbc1 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -386,20 +386,9 @@ xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags) #define XFS_ILOCK_EXCL (1<<2) #define XFS_ILOCK_SHARED (1<<3) #define XFS_IUNLOCK_NONOTIFY (1<<4) -/* #define XFS_IOLOCK_NESTED (1<<5) */ -#define XFS_EXTENT_TOKEN_RD (1<<6) -#define XFS_SIZE_TOKEN_RD (1<<7) -#define XFS_EXTSIZE_RD (XFS_EXTENT_TOKEN_RD|XFS_SIZE_TOKEN_RD) -#define XFS_WILLLEND (1<<8) /* Always acquire tokens for lending */ -#define XFS_EXTENT_TOKEN_WR (XFS_EXTENT_TOKEN_RD | XFS_WILLLEND) -#define XFS_SIZE_TOKEN_WR (XFS_SIZE_TOKEN_RD | XFS_WILLLEND) -#define XFS_EXTSIZE_WR (XFS_EXTSIZE_RD | XFS_WILLLEND) -/* TODO:XFS_SIZE_TOKEN_WANT (1<<9) */ #define XFS_LOCK_MASK (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \ - | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED \ - | XFS_EXTENT_TOKEN_RD | XFS_SIZE_TOKEN_RD \ - | XFS_WILLLEND) + | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED) /* * Flags for lockdep annotations. @@ -483,6 +472,7 @@ void xfs_ilock(xfs_inode_t *, uint); int xfs_ilock_nowait(xfs_inode_t *, uint); void xfs_iunlock(xfs_inode_t *, uint); void xfs_ilock_demote(xfs_inode_t *, uint); +int xfs_isilocked(xfs_inode_t *, uint); void xfs_iflock(xfs_inode_t *); int xfs_iflock_nowait(xfs_inode_t *); uint xfs_ilock_map_shared(xfs_inode_t *); diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c index 93b5db453ea..167b33f1577 100644 --- a/fs/xfs/xfs_inode_item.c +++ b/fs/xfs/xfs_inode_item.c @@ -547,7 +547,7 @@ STATIC void xfs_inode_item_pin( xfs_inode_log_item_t *iip) { - ASSERT(ismrlocked(&(iip->ili_inode->i_lock), MR_UPDATE)); + ASSERT(xfs_isilocked(iip->ili_inode, XFS_ILOCK_EXCL)); xfs_ipin(iip->ili_inode); } @@ -664,13 +664,13 @@ xfs_inode_item_unlock( ASSERT(iip != NULL); ASSERT(iip->ili_inode->i_itemp != NULL); - ASSERT(ismrlocked(&(iip->ili_inode->i_lock), MR_UPDATE)); + ASSERT(xfs_isilocked(iip->ili_inode, XFS_ILOCK_EXCL)); ASSERT((!(iip->ili_inode->i_itemp->ili_flags & XFS_ILI_IOLOCKED_EXCL)) || - ismrlocked(&(iip->ili_inode->i_iolock), MR_UPDATE)); + xfs_isilocked(iip->ili_inode, XFS_IOLOCK_EXCL)); ASSERT((!(iip->ili_inode->i_itemp->ili_flags & XFS_ILI_IOLOCKED_SHARED)) || - ismrlocked(&(iip->ili_inode->i_iolock), MR_ACCESS)); + xfs_isilocked(iip->ili_inode, XFS_IOLOCK_SHARED)); /* * Clear the transaction pointer in the inode. */ @@ -769,7 +769,7 @@ xfs_inode_item_pushbuf( ip = iip->ili_inode; - ASSERT(ismrlocked(&(ip->i_lock), MR_ACCESS)); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED)); /* * The ili_pushbuf_flag keeps others from @@ -857,7 +857,7 @@ xfs_inode_item_push( ip = iip->ili_inode; - ASSERT(ismrlocked(&(ip->i_lock), MR_ACCESS)); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED)); ASSERT(issemalocked(&(ip->i_flock))); /* * Since we were able to lock the inode's flush lock and diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c index fb3cf119141..a2c3200a099 100644 --- a/fs/xfs/xfs_iomap.c +++ b/fs/xfs/xfs_iomap.c @@ -196,14 +196,14 @@ xfs_iomap( break; case BMAPI_WRITE: xfs_iomap_enter_trace(XFS_IOMAP_WRITE_ENTER, ip, offset, count); - lockmode = XFS_ILOCK_EXCL|XFS_EXTSIZE_WR; + lockmode = XFS_ILOCK_EXCL; if (flags & BMAPI_IGNSTATE) bmapi_flags |= XFS_BMAPI_IGSTATE|XFS_BMAPI_ENTIRE; xfs_ilock(ip, lockmode); break; case BMAPI_ALLOCATE: xfs_iomap_enter_trace(XFS_IOMAP_ALLOC_ENTER, ip, offset, count); - lockmode = XFS_ILOCK_SHARED|XFS_EXTSIZE_RD; + lockmode = XFS_ILOCK_SHARED; bmapi_flags = XFS_BMAPI_ENTIRE; /* Attempt non-blocking lock */ @@ -624,7 +624,7 @@ xfs_iomap_write_delay( int prealloc, fsynced = 0; int error; - ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE) != 0); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); /* * Make sure that the dquots are there. This doesn't hold diff --git a/fs/xfs/xfs_trans_inode.c b/fs/xfs/xfs_trans_inode.c index b8db1d5cde5..4c70bf5e998 100644 --- a/fs/xfs/xfs_trans_inode.c +++ b/fs/xfs/xfs_trans_inode.c @@ -111,13 +111,13 @@ xfs_trans_iget( */ ASSERT(ip->i_itemp != NULL); ASSERT(lock_flags & XFS_ILOCK_EXCL); - ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE)); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); ASSERT((!(lock_flags & XFS_IOLOCK_EXCL)) || - ismrlocked(&ip->i_iolock, MR_UPDATE)); + xfs_isilocked(ip, XFS_IOLOCK_EXCL)); ASSERT((!(lock_flags & XFS_IOLOCK_EXCL)) || (ip->i_itemp->ili_flags & XFS_ILI_IOLOCKED_EXCL)); ASSERT((!(lock_flags & XFS_IOLOCK_SHARED)) || - ismrlocked(&ip->i_iolock, (MR_UPDATE | MR_ACCESS))); + xfs_isilocked(ip, XFS_IOLOCK_EXCL|XFS_IOLOCK_SHARED)); ASSERT((!(lock_flags & XFS_IOLOCK_SHARED)) || (ip->i_itemp->ili_flags & XFS_ILI_IOLOCKED_ANY)); @@ -185,7 +185,7 @@ xfs_trans_ijoin( xfs_inode_log_item_t *iip; ASSERT(ip->i_transp == NULL); - ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE)); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); ASSERT(lock_flags & XFS_ILOCK_EXCL); if (ip->i_itemp == NULL) xfs_inode_item_init(ip, ip->i_mount); @@ -232,7 +232,7 @@ xfs_trans_ihold( { ASSERT(ip->i_transp == tp); ASSERT(ip->i_itemp != NULL); - ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE)); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); ip->i_itemp->ili_flags |= XFS_ILI_HOLD; } @@ -257,7 +257,7 @@ xfs_trans_log_inode( ASSERT(ip->i_transp == tp); ASSERT(ip->i_itemp != NULL); - ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE)); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); lidp = xfs_trans_find_item(tp, (xfs_log_item_t*)(ip->i_itemp)); ASSERT(lidp != NULL); diff --git a/fs/xfs/xfs_utils.c b/fs/xfs/xfs_utils.c index 2b8dc7e4077..27075c9060e 100644 --- a/fs/xfs/xfs_utils.c +++ b/fs/xfs/xfs_utils.c @@ -310,7 +310,7 @@ xfs_bump_ino_vers2( { xfs_mount_t *mp; - ASSERT(ismrlocked (&ip->i_lock, MR_UPDATE)); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); ASSERT(ip->i_d.di_version == XFS_DINODE_VERSION_1); ip->i_d.di_version = XFS_DINODE_VERSION_2; diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c index 637fc1a2bb4..322ba094dcc 100644 --- a/fs/xfs/xfs_vnodeops.c +++ b/fs/xfs/xfs_vnodeops.c @@ -1305,7 +1305,7 @@ xfs_inactive_attrs( int error; xfs_mount_t *mp; - ASSERT(ismrlocked(&ip->i_iolock, MR_UPDATE)); + ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); tp = *tpp; mp = ip->i_mount; ASSERT(ip->i_d.di_forkoff != 0); @@ -1776,7 +1776,7 @@ xfs_create( * It is locked (and joined to the transaction). */ - ASSERT(ismrlocked (&ip->i_lock, MR_UPDATE)); + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); /* * Now we join the directory inode to the transaction. We do not do it -- cgit v1.2.3-70-g09d2 From cfa853e47df4fbee441ac0ac3fb592f076233145 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 22 Apr 2008 17:34:06 +1000 Subject: [XFS] remove manual lookup from xfs_rename and simplify locking ->rename already gets the target inode passed if it exits. Pass it down to xfs_rename so that we can avoid looking it up again. Also simplify locking as the first lock section in xfs_rename can go away now: the isdir is an invariant over the lifetime of the inode, and new_parent and the nlink check are namespace topology protected by i_mutex in the VFS. The projid check needs to move into the second lock section anyway to not be racy. Also kill the now unused xfs_dir_lookup_int and remove the now-unused first_locked argumet to xfs_lock_inodes. SGI-PV: 976035 SGI-Modid: xfs-linux-melb:xfs-kern:30903a Signed-off-by: Christoph Hellwig Signed-off-by: Lachlan McIlroy --- fs/xfs/linux-2.6/xfs_iops.c | 3 +- fs/xfs/xfs_dfrag.c | 4 +- fs/xfs/xfs_inode.h | 2 +- fs/xfs/xfs_rename.c | 185 +++++++++++--------------------------------- fs/xfs/xfs_utils.c | 43 ---------- fs/xfs/xfs_utils.h | 2 - fs/xfs/xfs_vnodeops.c | 14 +--- fs/xfs/xfs_vnodeops.h | 2 +- 8 files changed, 55 insertions(+), 200 deletions(-) (limited to 'fs') diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c index a1237dad643..2bf287ef548 100644 --- a/fs/xfs/linux-2.6/xfs_iops.c +++ b/fs/xfs/linux-2.6/xfs_iops.c @@ -511,7 +511,8 @@ xfs_vn_rename( xfs_dentry_to_name(&nname, ndentry); error = xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode), - XFS_I(ndir), &nname); + XFS_I(ndir), &nname, new_inode ? + XFS_I(new_inode) : NULL); if (likely(!error)) { if (new_inode) xfs_validate_fields(new_inode); diff --git a/fs/xfs/xfs_dfrag.c b/fs/xfs/xfs_dfrag.c index 3f53fad356a..5f3647cb988 100644 --- a/fs/xfs/xfs_dfrag.c +++ b/fs/xfs/xfs_dfrag.c @@ -162,7 +162,7 @@ xfs_swap_extents( ips[1] = ip; } - xfs_lock_inodes(ips, 2, 0, lock_flags); + xfs_lock_inodes(ips, 2, lock_flags); locked = 1; /* Verify that both files have the same format */ @@ -265,7 +265,7 @@ xfs_swap_extents( locked = 0; goto error0; } - xfs_lock_inodes(ips, 2, 0, XFS_ILOCK_EXCL); + xfs_lock_inodes(ips, 2, XFS_ILOCK_EXCL); /* * Count the number of extended attribute blocks diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index 877d71adbc1..0a999fee4f0 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -524,7 +524,7 @@ int xfs_iflush(xfs_inode_t *, uint); void xfs_iflush_all(struct xfs_mount *); void xfs_ichgtime(xfs_inode_t *, int); xfs_fsize_t xfs_file_last_byte(xfs_inode_t *); -void xfs_lock_inodes(xfs_inode_t **, int, int, uint); +void xfs_lock_inodes(xfs_inode_t **, int, uint); void xfs_synchronize_atime(xfs_inode_t *); void xfs_mark_inode_dirty_sync(xfs_inode_t *); diff --git a/fs/xfs/xfs_rename.c b/fs/xfs/xfs_rename.c index ee371890d85..6a141427f68 100644 --- a/fs/xfs/xfs_rename.c +++ b/fs/xfs/xfs_rename.c @@ -55,85 +55,32 @@ xfs_rename_unlock4( xfs_iunlock(i_tab[0], lock_mode); for (i = 1; i < 4; i++) { - if (i_tab[i] == NULL) { + if (i_tab[i] == NULL) break; - } + /* * Watch out for duplicate entries in the table. */ - if (i_tab[i] != i_tab[i-1]) { + if (i_tab[i] != i_tab[i-1]) xfs_iunlock(i_tab[i], lock_mode); - } } } -#ifdef DEBUG -int xfs_rename_skip, xfs_rename_nskip; -#endif - /* - * The following routine will acquire the locks required for a rename - * operation. The code understands the semantics of renames and will - * validate that name1 exists under dp1 & that name2 may or may not - * exist under dp2. - * - * We are renaming dp1/name1 to dp2/name2. - * - * Return ENOENT if dp1 does not exist, other lookup errors, or 0 for success. + * Enter all inodes for a rename transaction into a sorted array. */ -STATIC int -xfs_lock_for_rename( +STATIC void +xfs_sort_for_rename( xfs_inode_t *dp1, /* in: old (source) directory inode */ xfs_inode_t *dp2, /* in: new (target) directory inode */ xfs_inode_t *ip1, /* in: inode of old entry */ - struct xfs_name *name2, /* in: new entry name */ - xfs_inode_t **ipp2, /* out: inode of new entry, if it + xfs_inode_t *ip2, /* in: inode of new entry, if it already exists, NULL otherwise. */ xfs_inode_t **i_tab,/* out: array of inode returned, sorted */ int *num_inodes) /* out: number of inodes in array */ { - xfs_inode_t *ip2 = NULL; xfs_inode_t *temp; - xfs_ino_t inum1, inum2; - int error; int i, j; - uint lock_mode; - int diff_dirs = (dp1 != dp2); - - /* - * First, find out the current inums of the entries so that we - * can determine the initial locking order. We'll have to - * sanity check stuff after all the locks have been acquired - * to see if we still have the right inodes, directories, etc. - */ - lock_mode = xfs_ilock_map_shared(dp1); - IHOLD(ip1); - xfs_itrace_ref(ip1); - - inum1 = ip1->i_ino; - - /* - * Unlock dp1 and lock dp2 if they are different. - */ - if (diff_dirs) { - xfs_iunlock_map_shared(dp1, lock_mode); - lock_mode = xfs_ilock_map_shared(dp2); - } - - error = xfs_dir_lookup_int(dp2, lock_mode, name2, &inum2, &ip2); - if (error == ENOENT) { /* target does not need to exist. */ - inum2 = 0; - } else if (error) { - /* - * If dp2 and dp1 are the same, the next line unlocks dp1. - * Got it? - */ - xfs_iunlock_map_shared(dp2, lock_mode); - IRELE (ip1); - return error; - } else { - xfs_itrace_ref(ip2); - } /* * i_tab contains a list of pointers to inodes. We initialize @@ -145,21 +92,20 @@ xfs_lock_for_rename( i_tab[0] = dp1; i_tab[1] = dp2; i_tab[2] = ip1; - if (inum2 == 0) { - *num_inodes = 3; - i_tab[3] = NULL; - } else { + if (ip2) { *num_inodes = 4; i_tab[3] = ip2; + } else { + *num_inodes = 3; + i_tab[3] = NULL; } - *ipp2 = i_tab[3]; /* * Sort the elements via bubble sort. (Remember, there are at * most 4 elements to sort, so this is adequate.) */ - for (i=0; i < *num_inodes; i++) { - for (j=1; j < *num_inodes; j++) { + for (i = 0; i < *num_inodes; i++) { + for (j = 1; j < *num_inodes; j++) { if (i_tab[j]->i_ino < i_tab[j-1]->i_ino) { temp = i_tab[j]; i_tab[j] = i_tab[j-1]; @@ -167,30 +113,6 @@ xfs_lock_for_rename( } } } - - /* - * We have dp2 locked. If it isn't first, unlock it. - * If it is first, tell xfs_lock_inodes so it can skip it - * when locking. if dp1 == dp2, xfs_lock_inodes will skip both - * since they are equal. xfs_lock_inodes needs all these inodes - * so that it can unlock and retry if there might be a dead-lock - * potential with the log. - */ - - if (i_tab[0] == dp2 && lock_mode == XFS_ILOCK_SHARED) { -#ifdef DEBUG - xfs_rename_skip++; -#endif - xfs_lock_inodes(i_tab, *num_inodes, 1, XFS_ILOCK_SHARED); - } else { -#ifdef DEBUG - xfs_rename_nskip++; -#endif - xfs_iunlock_map_shared(dp2, lock_mode); - xfs_lock_inodes(i_tab, *num_inodes, 0, XFS_ILOCK_SHARED); - } - - return 0; } /* @@ -202,10 +124,10 @@ xfs_rename( struct xfs_name *src_name, xfs_inode_t *src_ip, xfs_inode_t *target_dp, - struct xfs_name *target_name) + struct xfs_name *target_name, + xfs_inode_t *target_ip) { - xfs_trans_t *tp; - xfs_inode_t *target_ip; + xfs_trans_t *tp = NULL; xfs_mount_t *mp = src_dp->i_mount; int new_parent; /* moving to a new dir */ int src_is_directory; /* src_name is a directory */ @@ -230,64 +152,31 @@ xfs_rename( target_dp, DM_RIGHT_NULL, src_name->name, target_name->name, 0, 0, 0); - if (error) { + if (error) return error; - } } /* Return through std_return after this point. */ - /* - * Lock all the participating inodes. Depending upon whether - * the target_name exists in the target directory, and - * whether the target directory is the same as the source - * directory, we can lock from 2 to 4 inodes. - * xfs_lock_for_rename() will return ENOENT if src_name - * does not exist in the source directory. - */ - tp = NULL; - error = xfs_lock_for_rename(src_dp, target_dp, src_ip, target_name, - &target_ip, inodes, &num_inodes); - if (error) { - /* - * We have nothing locked, no inode references, and - * no transaction, so just get out. - */ - goto std_return; - } - - ASSERT(src_ip != NULL); + new_parent = (src_dp != target_dp); + src_is_directory = ((src_ip->i_d.di_mode & S_IFMT) == S_IFDIR); - if ((src_ip->i_d.di_mode & S_IFMT) == S_IFDIR) { + if (src_is_directory) { /* * Check for link count overflow on target_dp */ - if (target_ip == NULL && (src_dp != target_dp) && + if (target_ip == NULL && new_parent && target_dp->i_d.di_nlink >= XFS_MAXLINK) { error = XFS_ERROR(EMLINK); - xfs_rename_unlock4(inodes, XFS_ILOCK_SHARED); - goto rele_return; + goto std_return; } } - /* - * If we are using project inheritance, we only allow renames - * into our tree when the project IDs are the same; else the - * tree quota mechanism would be circumvented. - */ - if (unlikely((target_dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && - (target_dp->i_d.di_projid != src_ip->i_d.di_projid))) { - error = XFS_ERROR(EXDEV); - xfs_rename_unlock4(inodes, XFS_ILOCK_SHARED); - goto rele_return; - } - - new_parent = (src_dp != target_dp); - src_is_directory = ((src_ip->i_d.di_mode & S_IFMT) == S_IFDIR); + xfs_sort_for_rename(src_dp, target_dp, src_ip, target_ip, + inodes, &num_inodes); - /* - * Drop the locks on our inodes so that we can start the transaction. - */ - xfs_rename_unlock4(inodes, XFS_ILOCK_SHARED); + IHOLD(src_ip); + if (target_ip) + IHOLD(target_ip); XFS_BMAP_INIT(&free_list, &first_block); tp = xfs_trans_alloc(mp, XFS_TRANS_RENAME); @@ -314,9 +203,25 @@ xfs_rename( } /* - * Reacquire the inode locks we dropped above. + * Lock all the participating inodes. Depending upon whether + * the target_name exists in the target directory, and + * whether the target directory is the same as the source + * directory, we can lock from 2 to 4 inodes. */ - xfs_lock_inodes(inodes, num_inodes, 0, XFS_ILOCK_EXCL); + xfs_lock_inodes(inodes, num_inodes, XFS_ILOCK_EXCL); + + /* + * If we are using project inheritance, we only allow renames + * into our tree when the project IDs are the same; else the + * tree quota mechanism would be circumvented. + */ + if (unlikely((target_dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && + (target_dp->i_d.di_projid != src_ip->i_d.di_projid))) { + error = XFS_ERROR(EXDEV); + xfs_rename_unlock4(inodes, XFS_ILOCK_SHARED); + xfs_trans_cancel(tp, cancel_flags); + goto rele_return; + } /* * Join all the inodes to the transaction. From this point on, diff --git a/fs/xfs/xfs_utils.c b/fs/xfs/xfs_utils.c index 27075c9060e..98e5f110ba5 100644 --- a/fs/xfs/xfs_utils.c +++ b/fs/xfs/xfs_utils.c @@ -41,49 +41,6 @@ #include "xfs_utils.h" -int -xfs_dir_lookup_int( - xfs_inode_t *dp, - uint lock_mode, - struct xfs_name *name, - xfs_ino_t *inum, - xfs_inode_t **ipp) -{ - int error; - - xfs_itrace_entry(dp); - - error = xfs_dir_lookup(NULL, dp, name, inum); - if (!error) { - /* - * Unlock the directory. We do this because we can't - * hold the directory lock while doing the vn_get() - * in xfs_iget(). Doing so could cause us to hold - * a lock while waiting for the inode to finish - * being inactive while it's waiting for a log - * reservation in the inactive routine. - */ - xfs_iunlock(dp, lock_mode); - error = xfs_iget(dp->i_mount, NULL, *inum, 0, 0, ipp, 0); - xfs_ilock(dp, lock_mode); - - if (error) { - *ipp = NULL; - } else if ((*ipp)->i_d.di_mode == 0) { - /* - * The inode has been freed. Something is - * wrong so just get out of here. - */ - xfs_iunlock(dp, lock_mode); - xfs_iput_new(*ipp, 0); - *ipp = NULL; - xfs_ilock(dp, lock_mode); - error = XFS_ERROR(ENOENT); - } - } - return error; -} - /* * Allocates a new inode from disk and return a pointer to the * incore copy. This routine will internally commit the current diff --git a/fs/xfs/xfs_utils.h b/fs/xfs/xfs_utils.h index 175b126d2ca..f316cb85d8e 100644 --- a/fs/xfs/xfs_utils.h +++ b/fs/xfs/xfs_utils.h @@ -21,8 +21,6 @@ #define IRELE(ip) VN_RELE(XFS_ITOV(ip)) #define IHOLD(ip) VN_HOLD(XFS_ITOV(ip)) -extern int xfs_dir_lookup_int(xfs_inode_t *, uint, struct xfs_name *, - xfs_ino_t *, xfs_inode_t **); extern int xfs_truncate_file(xfs_mount_t *, xfs_inode_t *); extern int xfs_dir_ialloc(xfs_trans_t **, xfs_inode_t *, mode_t, xfs_nlink_t, xfs_dev_t, cred_t *, prid_t, int, diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c index 322ba094dcc..308dfff76ae 100644 --- a/fs/xfs/xfs_vnodeops.c +++ b/fs/xfs/xfs_vnodeops.c @@ -1982,7 +1982,7 @@ again: ips[0] = ip; ips[1] = dp; - xfs_lock_inodes(ips, 2, 0, XFS_ILOCK_EXCL); + xfs_lock_inodes(ips, 2, XFS_ILOCK_EXCL); } /* else e_inum == dp->i_ino */ /* This can happen if we're asked to lock /x/.. @@ -2030,7 +2030,6 @@ void xfs_lock_inodes( xfs_inode_t **ips, int inodes, - int first_locked, uint lock_mode) { int attempts = 0, i, j, try_lock; @@ -2038,13 +2037,8 @@ xfs_lock_inodes( ASSERT(ips && (inodes >= 2)); /* we need at least two */ - if (first_locked) { - try_lock = 1; - i = 1; - } else { - try_lock = 0; - i = 0; - } + try_lock = 0; + i = 0; again: for (; i < inodes; i++) { @@ -2406,7 +2400,7 @@ xfs_link( ips[1] = sip; } - xfs_lock_inodes(ips, 2, 0, XFS_ILOCK_EXCL); + xfs_lock_inodes(ips, 2, XFS_ILOCK_EXCL); /* * Increment vnode ref counts since xfs_trans_commit & diff --git a/fs/xfs/xfs_vnodeops.h b/fs/xfs/xfs_vnodeops.h index 6b66904a383..ba798fccf72 100644 --- a/fs/xfs/xfs_vnodeops.h +++ b/fs/xfs/xfs_vnodeops.h @@ -47,7 +47,7 @@ int xfs_change_file_space(struct xfs_inode *ip, int cmd, struct cred *credp, int attr_flags); int xfs_rename(struct xfs_inode *src_dp, struct xfs_name *src_name, struct xfs_inode *src_ip, struct xfs_inode *target_dp, - struct xfs_name *target_name); + struct xfs_name *target_name, struct xfs_inode *target_ip); int xfs_attr_get(struct xfs_inode *ip, const char *name, char *value, int *valuelenp, int flags, cred_t *cred); int xfs_attr_set(struct xfs_inode *dp, const char *name, char *value, -- cgit v1.2.3-70-g09d2 From 1ac74e01df959e3e91baded7c83399372af945a2 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 22 Apr 2008 17:34:12 +1000 Subject: [XFS] kill usesless IHOLD calls in xfs_rename Similar to to the previous patch for remove and rmdir only grab a reference to inodes when we join them to transaction to balance the decrement on transaction completion. Everything else it taken care of by the VFS. Note that the old case had leaks of inode count when src == target or src or target == one of the parent inodes, but these cases are fortunately already rejected by the VFS. SGI-PV: 976035 SGI-Modid: xfs-linux-melb:xfs-kern:30904a Signed-off-by: Christoph Hellwig Signed-off-by: Lachlan McIlroy --- fs/xfs/xfs_rename.c | 75 +++++++---------------------------------------------- 1 file changed, 10 insertions(+), 65 deletions(-) (limited to 'fs') diff --git a/fs/xfs/xfs_rename.c b/fs/xfs/xfs_rename.c index 6a141427f68..d8063e1ad29 100644 --- a/fs/xfs/xfs_rename.c +++ b/fs/xfs/xfs_rename.c @@ -137,9 +137,7 @@ xfs_rename( int cancel_flags; int committed; xfs_inode_t *inodes[4]; - int target_ip_dropped = 0; /* dropped target_ip link? */ int spaceres; - int target_link_zero = 0; int num_inodes; xfs_itrace_entry(src_dp); @@ -174,10 +172,6 @@ xfs_rename( xfs_sort_for_rename(src_dp, target_dp, src_ip, target_ip, inodes, &num_inodes); - IHOLD(src_ip); - if (target_ip) - IHOLD(target_ip); - XFS_BMAP_INIT(&free_list, &first_block); tp = xfs_trans_alloc(mp, XFS_TRANS_RENAME); cancel_flags = XFS_TRANS_RELEASE_LOG_RES; @@ -191,7 +185,7 @@ xfs_rename( } if (error) { xfs_trans_cancel(tp, 0); - goto rele_return; + goto std_return; } /* @@ -199,7 +193,7 @@ xfs_rename( */ if ((error = XFS_QM_DQVOPRENAME(mp, inodes))) { xfs_trans_cancel(tp, cancel_flags); - goto rele_return; + goto std_return; } /* @@ -220,7 +214,7 @@ xfs_rename( error = XFS_ERROR(EXDEV); xfs_rename_unlock4(inodes, XFS_ILOCK_SHARED); xfs_trans_cancel(tp, cancel_flags); - goto rele_return; + goto std_return; } /* @@ -233,17 +227,17 @@ xfs_rename( */ IHOLD(src_dp); xfs_trans_ijoin(tp, src_dp, XFS_ILOCK_EXCL); + if (new_parent) { IHOLD(target_dp); xfs_trans_ijoin(tp, target_dp, XFS_ILOCK_EXCL); } - if ((src_ip != src_dp) && (src_ip != target_dp)) { - xfs_trans_ijoin(tp, src_ip, XFS_ILOCK_EXCL); - } - if ((target_ip != NULL) && - (target_ip != src_ip) && - (target_ip != src_dp) && - (target_ip != target_dp)) { + + IHOLD(src_ip); + xfs_trans_ijoin(tp, src_ip, XFS_ILOCK_EXCL); + + if (target_ip) { + IHOLD(target_ip); xfs_trans_ijoin(tp, target_ip, XFS_ILOCK_EXCL); } @@ -317,7 +311,6 @@ xfs_rename( error = xfs_droplink(tp, target_ip); if (error) goto abort_return; - target_ip_dropped = 1; if (src_is_directory) { /* @@ -327,10 +320,6 @@ xfs_rename( if (error) goto abort_return; } - - /* Do this test while we still hold the locks */ - target_link_zero = (target_ip)->i_d.di_nlink==0; - } /* target_ip != NULL */ /* @@ -396,15 +385,6 @@ xfs_rename( xfs_trans_log_inode(tp, target_dp, XFS_ILOG_CORE); } - /* - * If there was a target inode, take an extra reference on - * it here so that it doesn't go to xfs_inactive() from - * within the commit. - */ - if (target_ip != NULL) { - IHOLD(target_ip); - } - /* * If this is a synchronous mount, make sure that the * rename transaction goes to disk before returning to @@ -414,30 +394,11 @@ xfs_rename( xfs_trans_set_sync(tp); } - /* - * Take refs. for vop_link_removed calls below. No need to worry - * about directory refs. because the caller holds them. - * - * Do holds before the xfs_bmap_finish since it might rele them down - * to zero. - */ - - if (target_ip_dropped) - IHOLD(target_ip); - IHOLD(src_ip); - error = xfs_bmap_finish(&tp, &free_list, &committed); if (error) { xfs_bmap_cancel(&free_list); xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT)); - if (target_ip != NULL) { - IRELE(target_ip); - } - if (target_ip_dropped) { - IRELE(target_ip); - } - IRELE(src_ip); goto std_return; } @@ -446,15 +407,6 @@ xfs_rename( * the vnode references. */ error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); - if (target_ip != NULL) - IRELE(target_ip); - /* - * Let interposed file systems know about removed links. - */ - if (target_ip_dropped) - IRELE(target_ip); - - IRELE(src_ip); /* Fall through to std_return with error = 0 or errno from * xfs_trans_commit */ @@ -476,11 +428,4 @@ std_return: xfs_bmap_cancel(&free_list); xfs_trans_cancel(tp, cancel_flags); goto std_return; - - rele_return: - IRELE(src_ip); - if (target_ip != NULL) { - IRELE(target_ip); - } - goto std_return; } -- cgit v1.2.3-70-g09d2 From 82dab941a192d081dd0b7cde3ed32603372d5acc Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 22 Apr 2008 17:34:18 +1000 Subject: [XFS] kill parent == child checks in xfs_remove and xfs_rmdir VFS guaranteed these can't happen. SGI-PV: 976035 SGI-Modid: xfs-linux-melb:xfs-kern:30911a Signed-off-by: Christoph Hellwig Signed-off-by: Lachlan McIlroy --- fs/xfs/xfs_vnodeops.c | 25 ++++++------------------- 1 file changed, 6 insertions(+), 19 deletions(-) (limited to 'fs') diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c index 308dfff76ae..2ebfc60097d 100644 --- a/fs/xfs/xfs_vnodeops.c +++ b/fs/xfs/xfs_vnodeops.c @@ -2180,7 +2180,7 @@ xfs_remove( xfs_itrace_ref(ip); error = XFS_QM_DQATTACH(mp, dp, 0); - if (!error && dp != ip) + if (!error) error = XFS_QM_DQATTACH(mp, ip, 0); if (error) { REMOVE_DEBUG_TRACE(__LINE__); @@ -2228,15 +2228,9 @@ xfs_remove( * inodes locked. */ xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); - if (dp != ip) { - /* - * Increment vnode ref count only in this case since - * there's an extra vnode reference in the case where - * dp == ip. - */ - IHOLD(dp); - xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); - } + + IHOLD(dp); + xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); /* * Entry must exist since we did a lookup in xfs_lock_dir_and_entry. @@ -2747,7 +2741,7 @@ xfs_rmdir( * Get the dquots for the inodes. */ error = XFS_QM_DQATTACH(mp, dp, 0); - if (!error && dp != cdp) + if (!error) error = XFS_QM_DQATTACH(mp, cdp, 0); if (error) { IRELE(cdp); @@ -2796,14 +2790,7 @@ xfs_rmdir( } xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); - if (dp != cdp) { - /* - * Only increment the parent directory vnode count if - * we didn't bump it in looking up cdp. The only time - * we don't bump it is when we're looking up ".". - */ - VN_HOLD(dir_vp); - } + VN_HOLD(dir_vp); xfs_itrace_ref(cdp); xfs_trans_ijoin(tp, cdp, XFS_ILOCK_EXCL); -- cgit v1.2.3-70-g09d2 From 5df78e73d328e870a1cd8a9e0f39bf094e42ce9d Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 22 Apr 2008 17:34:24 +1000 Subject: [XFS] kill usesless IHOLD calls in xfs_remove and xfs_rmdir The VFS always has an inode reference when we call these functions. So we only need to grab a signle reference to each inode that's joined to a transaction - all the other bumping and dropping is as useless as the comments describing the IRIX semantics. SGI-PV: 976035 SGI-Modid: xfs-linux-melb:xfs-kern:30912a Signed-off-by: Christoph Hellwig Signed-off-by: Lachlan McIlroy --- fs/xfs/xfs_vnodeops.c | 63 ++++----------------------------------------------- 1 file changed, 4 insertions(+), 59 deletions(-) (limited to 'fs') diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c index 2ebfc60097d..70702a60b4b 100644 --- a/fs/xfs/xfs_vnodeops.c +++ b/fs/xfs/xfs_vnodeops.c @@ -2162,20 +2162,6 @@ xfs_remove( return error; } - /* - * We need to get a reference to ip before we get our log - * reservation. The reason for this is that we cannot call - * xfs_iget for an inode for which we do not have a reference - * once we've acquired a log reservation. This is because the - * inode we are trying to get might be in xfs_inactive going - * for a log reservation. Since we'll have to wait for the - * inactive code to complete before returning from xfs_iget, - * we need to make sure that we don't have log space reserved - * when we call xfs_iget. Instead we get an unlocked reference - * to the inode before getting our log reservation. - */ - IHOLD(ip); - xfs_itrace_entry(ip); xfs_itrace_ref(ip); @@ -2184,7 +2170,6 @@ xfs_remove( error = XFS_QM_DQATTACH(mp, ip, 0); if (error) { REMOVE_DEBUG_TRACE(__LINE__); - IRELE(ip); goto std_return; } @@ -2211,7 +2196,6 @@ xfs_remove( ASSERT(error != ENOSPC); REMOVE_DEBUG_TRACE(__LINE__); xfs_trans_cancel(tp, 0); - IRELE(ip); return error; } @@ -2219,7 +2203,6 @@ xfs_remove( if (error) { REMOVE_DEBUG_TRACE(__LINE__); xfs_trans_cancel(tp, cancel_flags); - IRELE(ip); goto std_return; } @@ -2227,6 +2210,7 @@ xfs_remove( * At this point, we've gotten both the directory and the entry * inodes locked. */ + IHOLD(ip); xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); IHOLD(dp); @@ -2259,12 +2243,6 @@ xfs_remove( */ link_zero = (ip)->i_d.di_nlink==0; - /* - * Take an extra ref on the inode so that it doesn't - * go to xfs_inactive() from within the commit. - */ - IHOLD(ip); - /* * If this is a synchronous mount, make sure that the * remove transaction goes to disk before returning to @@ -2281,10 +2259,8 @@ xfs_remove( } error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); - if (error) { - IRELE(ip); + if (error) goto std_return; - } /* * If we are using filestreams, kill the stream association. @@ -2296,7 +2272,6 @@ xfs_remove( xfs_filestream_deassociate(ip); xfs_itrace_exit(ip); - IRELE(ip); /* Fall through to std_return with error = 0 */ std_return: @@ -2325,8 +2300,6 @@ xfs_remove( cancel_flags |= XFS_TRANS_ABORT; xfs_trans_cancel(tp, cancel_flags); - IRELE(ip); - goto std_return; } @@ -2698,7 +2671,6 @@ xfs_rmdir( struct xfs_name *name, xfs_inode_t *cdp) { - bhv_vnode_t *dir_vp = XFS_ITOV(dp); xfs_mount_t *mp = dp->i_mount; xfs_trans_t *tp; int error; @@ -2723,20 +2695,6 @@ xfs_rmdir( return XFS_ERROR(error); } - /* - * We need to get a reference to cdp before we get our log - * reservation. The reason for this is that we cannot call - * xfs_iget for an inode for which we do not have a reference - * once we've acquired a log reservation. This is because the - * inode we are trying to get might be in xfs_inactive going - * for a log reservation. Since we'll have to wait for the - * inactive code to complete before returning from xfs_iget, - * we need to make sure that we don't have log space reserved - * when we call xfs_iget. Instead we get an unlocked reference - * to the inode before getting our log reservation. - */ - IHOLD(cdp); - /* * Get the dquots for the inodes. */ @@ -2744,7 +2702,6 @@ xfs_rmdir( if (!error) error = XFS_QM_DQATTACH(mp, cdp, 0); if (error) { - IRELE(cdp); REMOVE_DEBUG_TRACE(__LINE__); goto std_return; } @@ -2771,7 +2728,6 @@ xfs_rmdir( if (error) { ASSERT(error != ENOSPC); cancel_flags = 0; - IRELE(cdp); goto error_return; } XFS_BMAP_INIT(&free_list, &first_block); @@ -2785,14 +2741,13 @@ xfs_rmdir( error = xfs_lock_dir_and_entry(dp, cdp); if (error) { xfs_trans_cancel(tp, cancel_flags); - IRELE(cdp); goto std_return; } + IHOLD(dp); xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); - VN_HOLD(dir_vp); - xfs_itrace_ref(cdp); + IHOLD(cdp); xfs_trans_ijoin(tp, cdp, XFS_ILOCK_EXCL); ASSERT(cdp->i_d.di_nlink >= 2); @@ -2845,12 +2800,6 @@ xfs_rmdir( /* Determine these before committing transaction */ last_cdp_link = (cdp)->i_d.di_nlink==0; - /* - * Take an extra ref on the child vnode so that it - * does not go to xfs_inactive() from within the commit. - */ - IHOLD(cdp); - /* * If this is a synchronous mount, make sure that the * rmdir transaction goes to disk before returning to @@ -2865,19 +2814,15 @@ xfs_rmdir( xfs_bmap_cancel(&free_list); xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT)); - IRELE(cdp); goto std_return; } error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); if (error) { - IRELE(cdp); goto std_return; } - IRELE(cdp); - /* Fall through to std_return with error = 0 or the errno * from xfs_trans_commit. */ std_return: -- cgit v1.2.3-70-g09d2 From e8b0ebaa115ac46b21622b103c29927f5805aeaa Mon Sep 17 00:00:00 2001 From: Barry Naujok Date: Tue, 22 Apr 2008 17:34:31 +1000 Subject: [XFS] Cleanup xfs_attr a bit with xfs_name and remove cred SGI-PV: 976035 SGI-Modid: xfs-linux-melb:xfs-kern:30913a Signed-off-by: Barry Naujok Signed-off-by: Christoph Hellwig Signed-off-by: Lachlan McIlroy --- fs/xfs/linux-2.6/xfs_ioctl.c | 6 +-- fs/xfs/xfs_acl.c | 7 ++-- fs/xfs/xfs_attr.c | 93 +++++++++++++++++++++++++------------------- fs/xfs/xfs_attr.h | 6 +-- fs/xfs/xfs_vnodeops.h | 2 +- 5 files changed, 62 insertions(+), 52 deletions(-) (limited to 'fs') diff --git a/fs/xfs/linux-2.6/xfs_ioctl.c b/fs/xfs/linux-2.6/xfs_ioctl.c index 98e87804991..a42ba9d7115 100644 --- a/fs/xfs/linux-2.6/xfs_ioctl.c +++ b/fs/xfs/linux-2.6/xfs_ioctl.c @@ -505,14 +505,14 @@ xfs_attrmulti_attr_get( { char *kbuf; int error = EFAULT; - + if (*len > XATTR_SIZE_MAX) return EINVAL; kbuf = kmalloc(*len, GFP_KERNEL); if (!kbuf) return ENOMEM; - error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags, NULL); + error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags); if (error) goto out_kfree; @@ -546,7 +546,7 @@ xfs_attrmulti_attr_set( if (copy_from_user(kbuf, ubuf, len)) goto out_kfree; - + error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags); out_kfree: diff --git a/fs/xfs/xfs_acl.c b/fs/xfs/xfs_acl.c index 796e76ef271..ebee3a4f703 100644 --- a/fs/xfs/xfs_acl.c +++ b/fs/xfs/xfs_acl.c @@ -334,14 +334,15 @@ xfs_acl_iaccess( { xfs_acl_t *acl; int rval; + struct xfs_name acl_name = {SGI_ACL_FILE, SGI_ACL_FILE_SIZE}; if (!(_ACL_ALLOC(acl))) return -1; /* If the file has no ACL return -1. */ rval = sizeof(xfs_acl_t); - if (xfs_attr_fetch(ip, SGI_ACL_FILE, SGI_ACL_FILE_SIZE, - (char *)acl, &rval, ATTR_ROOT | ATTR_KERNACCESS, cr)) { + if (xfs_attr_fetch(ip, &acl_name, (char *)acl, &rval, + ATTR_ROOT | ATTR_KERNACCESS)) { _ACL_FREE(acl); return -1; } @@ -579,7 +580,7 @@ xfs_acl_get_attr( *error = xfs_attr_get(xfs_vtoi(vp), kind == _ACL_TYPE_ACCESS ? SGI_ACL_FILE : SGI_ACL_DEFAULT, - (char *)aclp, &len, flags, sys_cred); + (char *)aclp, &len, flags); if (*error || (flags & ATTR_KERNOVAL)) return; xfs_acl_get_endian(aclp); diff --git a/fs/xfs/xfs_attr.c b/fs/xfs/xfs_attr.c index 36d781ee5fc..df151a85918 100644 --- a/fs/xfs/xfs_attr.c +++ b/fs/xfs/xfs_attr.c @@ -101,14 +101,28 @@ STATIC int xfs_attr_rmtval_remove(xfs_da_args_t *args); ktrace_t *xfs_attr_trace_buf; #endif +STATIC int +xfs_attr_name_to_xname( + struct xfs_name *xname, + const char *aname) +{ + if (!aname) + return EINVAL; + xname->name = aname; + xname->len = strlen(aname); + if (xname->len >= MAXNAMELEN) + return EFAULT; /* match IRIX behaviour */ + + return 0; +} /*======================================================================== * Overall external interface routines. *========================================================================*/ int -xfs_attr_fetch(xfs_inode_t *ip, const char *name, int namelen, - char *value, int *valuelenp, int flags, struct cred *cred) +xfs_attr_fetch(xfs_inode_t *ip, struct xfs_name *name, + char *value, int *valuelenp, int flags) { xfs_da_args_t args; int error; @@ -122,8 +136,8 @@ xfs_attr_fetch(xfs_inode_t *ip, const char *name, int namelen, * Fill in the arg structure for this request. */ memset((char *)&args, 0, sizeof(args)); - args.name = name; - args.namelen = namelen; + args.name = name->name; + args.namelen = name->len; args.value = value; args.valuelen = *valuelenp; args.flags = flags; @@ -162,31 +176,29 @@ xfs_attr_get( const char *name, char *value, int *valuelenp, - int flags, - cred_t *cred) + int flags) { - int error, namelen; + int error; + struct xfs_name xname; XFS_STATS_INC(xs_attr_get); - if (!name) - return(EINVAL); - namelen = strlen(name); - if (namelen >= MAXNAMELEN) - return(EFAULT); /* match IRIX behaviour */ - if (XFS_FORCED_SHUTDOWN(ip->i_mount)) return(EIO); + error = xfs_attr_name_to_xname(&xname, name); + if (error) + return error; + xfs_ilock(ip, XFS_ILOCK_SHARED); - error = xfs_attr_fetch(ip, name, namelen, value, valuelenp, flags, cred); + error = xfs_attr_fetch(ip, &xname, value, valuelenp, flags); xfs_iunlock(ip, XFS_ILOCK_SHARED); return(error); } -int -xfs_attr_set_int(xfs_inode_t *dp, const char *name, int namelen, - char *value, int valuelen, int flags) +STATIC int +xfs_attr_set_int(xfs_inode_t *dp, struct xfs_name *name, + char *value, int valuelen, int flags) { xfs_da_args_t args; xfs_fsblock_t firstblock; @@ -209,7 +221,7 @@ xfs_attr_set_int(xfs_inode_t *dp, const char *name, int namelen, */ if (XFS_IFORK_Q(dp) == 0) { int sf_size = sizeof(xfs_attr_sf_hdr_t) + - XFS_ATTR_SF_ENTSIZE_BYNAME(namelen, valuelen); + XFS_ATTR_SF_ENTSIZE_BYNAME(name->len, valuelen); if ((error = xfs_bmap_add_attrfork(dp, sf_size, rsvd))) return(error); @@ -219,8 +231,8 @@ xfs_attr_set_int(xfs_inode_t *dp, const char *name, int namelen, * Fill in the arg structure for this request. */ memset((char *)&args, 0, sizeof(args)); - args.name = name; - args.namelen = namelen; + args.name = name->name; + args.namelen = name->len; args.value = value; args.valuelen = valuelen; args.flags = flags; @@ -236,7 +248,7 @@ xfs_attr_set_int(xfs_inode_t *dp, const char *name, int namelen, * Determine space new attribute will use, and if it would be * "local" or "remote" (note: local != inline). */ - size = xfs_attr_leaf_newentsize(namelen, valuelen, + size = xfs_attr_leaf_newentsize(name->len, valuelen, mp->m_sb.sb_blocksize, &local); nblks = XFS_DAENTER_SPACE_RES(mp, XFS_ATTR_FORK); @@ -429,26 +441,27 @@ xfs_attr_set( int valuelen, int flags) { - int namelen; - - namelen = strlen(name); - if (namelen >= MAXNAMELEN) - return EFAULT; /* match IRIX behaviour */ + int error; + struct xfs_name xname; XFS_STATS_INC(xs_attr_set); if (XFS_FORCED_SHUTDOWN(dp->i_mount)) return (EIO); - return xfs_attr_set_int(dp, name, namelen, value, valuelen, flags); + error = xfs_attr_name_to_xname(&xname, name); + if (error) + return error; + + return xfs_attr_set_int(dp, &xname, value, valuelen, flags); } /* * Generic handler routine to remove a name from an attribute list. * Transitions attribute list from Btree to shortform as necessary. */ -int -xfs_attr_remove_int(xfs_inode_t *dp, const char *name, int namelen, int flags) +STATIC int +xfs_attr_remove_int(xfs_inode_t *dp, struct xfs_name *name, int flags) { xfs_da_args_t args; xfs_fsblock_t firstblock; @@ -460,8 +473,8 @@ xfs_attr_remove_int(xfs_inode_t *dp, const char *name, int namelen, int flags) * Fill in the arg structure for this request. */ memset((char *)&args, 0, sizeof(args)); - args.name = name; - args.namelen = namelen; + args.name = name->name; + args.namelen = name->len; args.flags = flags; args.hashval = xfs_da_hashname(args.name, args.namelen); args.dp = dp; @@ -575,17 +588,18 @@ xfs_attr_remove( const char *name, int flags) { - int namelen; - - namelen = strlen(name); - if (namelen >= MAXNAMELEN) - return EFAULT; /* match IRIX behaviour */ + int error; + struct xfs_name xname; XFS_STATS_INC(xs_attr_remove); if (XFS_FORCED_SHUTDOWN(dp->i_mount)) return (EIO); + error = xfs_attr_name_to_xname(&xname, name); + if (error) + return error; + xfs_ilock(dp, XFS_ILOCK_SHARED); if (XFS_IFORK_Q(dp) == 0 || (dp->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS && @@ -595,10 +609,10 @@ xfs_attr_remove( } xfs_iunlock(dp, XFS_ILOCK_SHARED); - return xfs_attr_remove_int(dp, name, namelen, flags); + return xfs_attr_remove_int(dp, &xname, flags); } -int /* error */ +STATIC int xfs_attr_list_int(xfs_attr_list_context_t *context) { int error; @@ -2522,8 +2536,7 @@ attr_generic_get( { int error, asize = size; - error = xfs_attr_get(xfs_vtoi(vp), name, data, - &asize, xflags, NULL); + error = xfs_attr_get(xfs_vtoi(vp), name, data, &asize, xflags); if (!error) return asize; return -error; diff --git a/fs/xfs/xfs_attr.h b/fs/xfs/xfs_attr.h index 786eba3121c..6cfc9384fe3 100644 --- a/fs/xfs/xfs_attr.h +++ b/fs/xfs/xfs_attr.h @@ -158,14 +158,10 @@ struct xfs_da_args; /* * Overall external interface routines. */ -int xfs_attr_set_int(struct xfs_inode *, const char *, int, char *, int, int); -int xfs_attr_remove_int(struct xfs_inode *, const char *, int, int); -int xfs_attr_list_int(struct xfs_attr_list_context *); int xfs_attr_inactive(struct xfs_inode *dp); int xfs_attr_shortform_getvalue(struct xfs_da_args *); -int xfs_attr_fetch(struct xfs_inode *, const char *, int, - char *, int *, int, struct cred *); +int xfs_attr_fetch(struct xfs_inode *, struct xfs_name *, char *, int *, int); int xfs_attr_rmtval_get(struct xfs_da_args *args); #endif /* __XFS_ATTR_H__ */ diff --git a/fs/xfs/xfs_vnodeops.h b/fs/xfs/xfs_vnodeops.h index ba798fccf72..827afc99700 100644 --- a/fs/xfs/xfs_vnodeops.h +++ b/fs/xfs/xfs_vnodeops.h @@ -49,7 +49,7 @@ int xfs_rename(struct xfs_inode *src_dp, struct xfs_name *src_name, struct xfs_inode *src_ip, struct xfs_inode *target_dp, struct xfs_name *target_name, struct xfs_inode *target_ip); int xfs_attr_get(struct xfs_inode *ip, const char *name, char *value, - int *valuelenp, int flags, cred_t *cred); + int *valuelenp, int flags); int xfs_attr_set(struct xfs_inode *dp, const char *name, char *value, int valuelen, int flags); int xfs_attr_remove(struct xfs_inode *dp, const char *name, int flags); -- cgit v1.2.3-70-g09d2 From d4d90b577ee5af5c1b29bd693aca026a77a1a2f1 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 22 Apr 2008 17:34:37 +1000 Subject: [XFS] Add xfs_icsb_sync_counters_locked for when m_sb_lock already held Add a new xfs_icsb_sync_counters_locked for the case where m_sb_lock is already taken and add a flags argument to xfs_icsb_sync_counters so that xfs_icsb_sync_counters_flags is not needed. SGI-PV: 976035 SGI-Modid: xfs-linux-melb:xfs-kern:30917a Signed-off-by: Christoph Hellwig Signed-off-by: David Chinner Signed-off-by: Lachlan McIlroy --- fs/xfs/linux-2.6/xfs_super.c | 2 +- fs/xfs/xfs_fsops.c | 4 ++-- fs/xfs/xfs_mount.c | 23 ++++++++--------------- fs/xfs/xfs_mount.h | 5 +++-- 4 files changed, 14 insertions(+), 20 deletions(-) (limited to 'fs') diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c index 865eb708aa9..742b2c7852c 100644 --- a/fs/xfs/linux-2.6/xfs_super.c +++ b/fs/xfs/linux-2.6/xfs_super.c @@ -1181,7 +1181,7 @@ xfs_fs_statfs( statp->f_fsid.val[0] = (u32)id; statp->f_fsid.val[1] = (u32)(id >> 32); - xfs_icsb_sync_counters_flags(mp, XFS_ICSB_LAZY_COUNT); + xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT); spin_lock(&mp->m_sb_lock); statp->f_bsize = sbp->sb_blocksize; diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c index d3a0f538d6a..5d5e9b34dd0 100644 --- a/fs/xfs/xfs_fsops.c +++ b/fs/xfs/xfs_fsops.c @@ -462,7 +462,7 @@ xfs_fs_counts( xfs_mount_t *mp, xfs_fsop_counts_t *cnt) { - xfs_icsb_sync_counters_flags(mp, XFS_ICSB_LAZY_COUNT); + xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT); spin_lock(&mp->m_sb_lock); cnt->freedata = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); cnt->freertx = mp->m_sb.sb_frextents; @@ -524,7 +524,7 @@ xfs_reserve_blocks( */ retry: spin_lock(&mp->m_sb_lock); - xfs_icsb_sync_counters_flags(mp, XFS_ICSB_SB_LOCKED); + xfs_icsb_sync_counters_locked(mp, 0); /* * If our previous reservation was larger than the current value, diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index 2fec452afbc..a2fad07fd84 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -55,7 +55,6 @@ STATIC void xfs_unmountfs_wait(xfs_mount_t *); STATIC void xfs_icsb_destroy_counters(xfs_mount_t *); STATIC void xfs_icsb_balance_counter(xfs_mount_t *, xfs_sb_field_t, int, int); -STATIC void xfs_icsb_sync_counters(xfs_mount_t *); STATIC int xfs_icsb_modify_counters(xfs_mount_t *, xfs_sb_field_t, int64_t, int); STATIC void xfs_icsb_disable_counter(xfs_mount_t *, xfs_sb_field_t); @@ -64,7 +63,6 @@ STATIC void xfs_icsb_disable_counter(xfs_mount_t *, xfs_sb_field_t); #define xfs_icsb_destroy_counters(mp) do { } while (0) #define xfs_icsb_balance_counter(mp, a, b, c) do { } while (0) -#define xfs_icsb_sync_counters(mp) do { } while (0) #define xfs_icsb_modify_counters(mp, a, b, c) do { } while (0) #endif @@ -1400,7 +1398,7 @@ xfs_log_sbcount( if (!xfs_fs_writable(mp)) return 0; - xfs_icsb_sync_counters(mp); + xfs_icsb_sync_counters(mp, 0); /* * we don't need to do this if we are updating the superblock @@ -2278,38 +2276,33 @@ xfs_icsb_enable_counter( } void -xfs_icsb_sync_counters_flags( +xfs_icsb_sync_counters_locked( xfs_mount_t *mp, int flags) { xfs_icsb_cnts_t cnt; - /* Pass 1: lock all counters */ - if ((flags & XFS_ICSB_SB_LOCKED) == 0) - spin_lock(&mp->m_sb_lock); - xfs_icsb_count(mp, &cnt, flags); - /* Step 3: update mp->m_sb fields */ if (!xfs_icsb_counter_disabled(mp, XFS_SBS_ICOUNT)) mp->m_sb.sb_icount = cnt.icsb_icount; if (!xfs_icsb_counter_disabled(mp, XFS_SBS_IFREE)) mp->m_sb.sb_ifree = cnt.icsb_ifree; if (!xfs_icsb_counter_disabled(mp, XFS_SBS_FDBLOCKS)) mp->m_sb.sb_fdblocks = cnt.icsb_fdblocks; - - if ((flags & XFS_ICSB_SB_LOCKED) == 0) - spin_unlock(&mp->m_sb_lock); } /* * Accurate update of per-cpu counters to incore superblock */ -STATIC void +void xfs_icsb_sync_counters( - xfs_mount_t *mp) + xfs_mount_t *mp, + int flags) { - xfs_icsb_sync_counters_flags(mp, 0); + spin_lock(&mp->m_sb_lock); + xfs_icsb_sync_counters_locked(mp, flags); + spin_unlock(&mp->m_sb_lock); } /* diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index 1ed575110ff..06ecaeb338a 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -211,12 +211,13 @@ typedef struct xfs_icsb_cnts { extern int xfs_icsb_init_counters(struct xfs_mount *); extern void xfs_icsb_reinit_counters(struct xfs_mount *); -extern void xfs_icsb_sync_counters_flags(struct xfs_mount *, int); +extern void xfs_icsb_sync_counters(struct xfs_mount *, int); +extern void xfs_icsb_sync_counters_locked(struct xfs_mount *, int); #else #define xfs_icsb_init_counters(mp) (0) #define xfs_icsb_reinit_counters(mp) do { } while (0) -#define xfs_icsb_sync_counters_flags(mp, flags) do { } while (0) +#define xfs_icsb_sync_counters(mp, flags) do { } while (0) #endif typedef struct xfs_ail { -- cgit v1.2.3-70-g09d2 From 45af6c6de6453b385c80555c0ee40ab5fc4a033b Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 22 Apr 2008 17:34:44 +1000 Subject: [XFS] split xfs_icsb_balance_counter Add an xfs_icsb_balance_counter_locked for the case where mp->m_sb_lock is already locked. SGI-PV: 976035 SGI-Modid: xfs-linux-melb:xfs-kern:30918a Signed-off-by: Christoph Hellwig Signed-off-by: David Chinner Signed-off-by: Lachlan McIlroy --- fs/xfs/xfs_mount.c | 58 +++++++++++++++++++++++++++++------------------------- 1 file changed, 31 insertions(+), 27 deletions(-) (limited to 'fs') diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index a2fad07fd84..8bdc16381bc 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -54,7 +54,9 @@ STATIC void xfs_unmountfs_wait(xfs_mount_t *); #ifdef HAVE_PERCPU_SB STATIC void xfs_icsb_destroy_counters(xfs_mount_t *); STATIC void xfs_icsb_balance_counter(xfs_mount_t *, xfs_sb_field_t, - int, int); + int); +STATIC void xfs_icsb_balance_counter_locked(xfs_mount_t *, xfs_sb_field_t, + int); STATIC int xfs_icsb_modify_counters(xfs_mount_t *, xfs_sb_field_t, int64_t, int); STATIC void xfs_icsb_disable_counter(xfs_mount_t *, xfs_sb_field_t); @@ -62,7 +64,8 @@ STATIC void xfs_icsb_disable_counter(xfs_mount_t *, xfs_sb_field_t); #else #define xfs_icsb_destroy_counters(mp) do { } while (0) -#define xfs_icsb_balance_counter(mp, a, b, c) do { } while (0) +#define xfs_icsb_balance_counter(mp, a, b) do { } while (0) +#define xfs_icsb_balance_counter_locked(mp, a, b) do { } while (0) #define xfs_icsb_modify_counters(mp, a, b, c) do { } while (0) #endif @@ -2024,9 +2027,9 @@ xfs_icsb_cpu_notify( case CPU_ONLINE: case CPU_ONLINE_FROZEN: xfs_icsb_lock(mp); - xfs_icsb_balance_counter(mp, XFS_SBS_ICOUNT, 0, 0); - xfs_icsb_balance_counter(mp, XFS_SBS_IFREE, 0, 0); - xfs_icsb_balance_counter(mp, XFS_SBS_FDBLOCKS, 0, 0); + xfs_icsb_balance_counter(mp, XFS_SBS_ICOUNT, 0); + xfs_icsb_balance_counter(mp, XFS_SBS_IFREE, 0); + xfs_icsb_balance_counter(mp, XFS_SBS_FDBLOCKS, 0); xfs_icsb_unlock(mp); break; case CPU_DEAD: @@ -2046,12 +2049,9 @@ xfs_icsb_cpu_notify( memset(cntp, 0, sizeof(xfs_icsb_cnts_t)); - xfs_icsb_balance_counter(mp, XFS_SBS_ICOUNT, - XFS_ICSB_SB_LOCKED, 0); - xfs_icsb_balance_counter(mp, XFS_SBS_IFREE, - XFS_ICSB_SB_LOCKED, 0); - xfs_icsb_balance_counter(mp, XFS_SBS_FDBLOCKS, - XFS_ICSB_SB_LOCKED, 0); + xfs_icsb_balance_counter_locked(mp, XFS_SBS_ICOUNT, 0); + xfs_icsb_balance_counter_locked(mp, XFS_SBS_IFREE, 0); + xfs_icsb_balance_counter_locked(mp, XFS_SBS_FDBLOCKS, 0); spin_unlock(&mp->m_sb_lock); xfs_icsb_unlock(mp); break; @@ -2103,9 +2103,9 @@ xfs_icsb_reinit_counters( * initial balance kicks us off correctly */ mp->m_icsb_counters = -1; - xfs_icsb_balance_counter(mp, XFS_SBS_ICOUNT, 0, 0); - xfs_icsb_balance_counter(mp, XFS_SBS_IFREE, 0, 0); - xfs_icsb_balance_counter(mp, XFS_SBS_FDBLOCKS, 0, 0); + xfs_icsb_balance_counter(mp, XFS_SBS_ICOUNT, 0); + xfs_icsb_balance_counter(mp, XFS_SBS_IFREE, 0); + xfs_icsb_balance_counter(mp, XFS_SBS_FDBLOCKS, 0); xfs_icsb_unlock(mp); } @@ -2325,19 +2325,15 @@ xfs_icsb_sync_counters( #define XFS_ICSB_FDBLK_CNTR_REENABLE(mp) \ (uint64_t)(512 + XFS_ALLOC_SET_ASIDE(mp)) STATIC void -xfs_icsb_balance_counter( +xfs_icsb_balance_counter_locked( xfs_mount_t *mp, xfs_sb_field_t field, - int flags, int min_per_cpu) { uint64_t count, resid; int weight = num_online_cpus(); uint64_t min = (uint64_t)min_per_cpu; - if (!(flags & XFS_ICSB_SB_LOCKED)) - spin_lock(&mp->m_sb_lock); - /* disable counter and sync counter */ xfs_icsb_disable_counter(mp, field); @@ -2347,19 +2343,19 @@ xfs_icsb_balance_counter( count = mp->m_sb.sb_icount; resid = do_div(count, weight); if (count < max(min, XFS_ICSB_INO_CNTR_REENABLE)) - goto out; + return; break; case XFS_SBS_IFREE: count = mp->m_sb.sb_ifree; resid = do_div(count, weight); if (count < max(min, XFS_ICSB_INO_CNTR_REENABLE)) - goto out; + return; break; case XFS_SBS_FDBLOCKS: count = mp->m_sb.sb_fdblocks; resid = do_div(count, weight); if (count < max(min, XFS_ICSB_FDBLK_CNTR_REENABLE(mp))) - goto out; + return; break; default: BUG(); @@ -2368,9 +2364,17 @@ xfs_icsb_balance_counter( } xfs_icsb_enable_counter(mp, field, count, resid); -out: - if (!(flags & XFS_ICSB_SB_LOCKED)) - spin_unlock(&mp->m_sb_lock); +} + +STATIC void +xfs_icsb_balance_counter( + xfs_mount_t *mp, + xfs_sb_field_t fields, + int min_per_cpu) +{ + spin_lock(&mp->m_sb_lock); + xfs_icsb_balance_counter_locked(mp, fields, min_per_cpu); + spin_unlock(&mp->m_sb_lock); } STATIC int @@ -2477,7 +2481,7 @@ slow_path: * we are done. */ if (ret != ENOSPC) - xfs_icsb_balance_counter(mp, field, 0, 0); + xfs_icsb_balance_counter(mp, field, 0); xfs_icsb_unlock(mp); return ret; @@ -2501,7 +2505,7 @@ balance_counter: * will either succeed through the fast path or slow path without * another balance operation being required. */ - xfs_icsb_balance_counter(mp, field, 0, delta); + xfs_icsb_balance_counter(mp, field, delta); xfs_icsb_unlock(mp); goto again; } -- cgit v1.2.3-70-g09d2 From ce46193bcaaf3c769718bcec6eae94719b8f53ed Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 22 Apr 2008 17:34:50 +1000 Subject: [XFS] kill XFS_ICSB_SB_LOCKED With the last two patches XFS_ICSB_SB_LOCKED is never checked and only superflously passed to xfs_icsb_count, so kill it. SGI-PV: 976035 SGI-Modid: xfs-linux-melb:xfs-kern:30920a Signed-off-by: Christoph Hellwig Signed-off-by: David Chinner Signed-off-by: Lachlan McIlroy --- fs/xfs/xfs_mount.c | 2 +- fs/xfs/xfs_mount.h | 1 - 2 files changed, 1 insertion(+), 2 deletions(-) (limited to 'fs') diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index 8bdc16381bc..da3988453b7 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -2221,7 +2221,7 @@ xfs_icsb_disable_counter( if (!test_and_set_bit(field, &mp->m_icsb_counters)) { /* drain back to superblock */ - xfs_icsb_count(mp, &cnt, XFS_ICSB_SB_LOCKED|XFS_ICSB_LAZY_COUNT); + xfs_icsb_count(mp, &cnt, XFS_ICSB_LAZY_COUNT); switch(field) { case XFS_SBS_ICOUNT: mp->m_sb.sb_icount = cnt.icsb_icount; diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index 06ecaeb338a..27b558ee576 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -206,7 +206,6 @@ typedef struct xfs_icsb_cnts { #define XFS_ICSB_FLAG_LOCK (1 << 0) /* counter lock bit */ -#define XFS_ICSB_SB_LOCKED (1 << 0) /* sb already locked */ #define XFS_ICSB_LAZY_COUNT (1 << 1) /* accuracy not needed */ extern int xfs_icsb_init_counters(struct xfs_mount *); -- cgit v1.2.3-70-g09d2 From 18d18208daced52123de9ba0808447058d3442d8 Mon Sep 17 00:00:00 2001 From: Donald Douwsma Date: Tue, 22 Apr 2008 17:34:56 +1000 Subject: [XFS] Fix broken HAVE_SPLICE removal commit. Commit e687330b5ed1ea899fdaf0dea50aba196b6e019a was meant to remove the unused HAVE_SPLICE macro, instead an unrelated change was checked enabling QUOTADEBUG when building DEBUG XFS. Restore the intended changes. SGI-PV: 971046 SGI-Modid: xfs-linux-melb:xfs-kern:30924a Signed-off-by: Donald Douwsma Signed-off-by: Barry Naujok Signed-off-by: Lachlan McIlroy --- fs/xfs/linux-2.6/xfs_linux.h | 1 - fs/xfs/xfs.h | 2 +- 2 files changed, 1 insertion(+), 2 deletions(-) (limited to 'fs') diff --git a/fs/xfs/linux-2.6/xfs_linux.h b/fs/xfs/linux-2.6/xfs_linux.h index e5143323e71..1bc9f600365 100644 --- a/fs/xfs/linux-2.6/xfs_linux.h +++ b/fs/xfs/linux-2.6/xfs_linux.h @@ -99,7 +99,6 @@ /* * Feature macros (disable/enable) */ -#define HAVE_SPLICE /* a splice(2) exists in 2.6, but not in 2.4 */ #ifdef CONFIG_SMP #define HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */ #else diff --git a/fs/xfs/xfs.h b/fs/xfs/xfs.h index 765aaf65e2d..540e4c98982 100644 --- a/fs/xfs/xfs.h +++ b/fs/xfs/xfs.h @@ -22,7 +22,7 @@ #define STATIC #define DEBUG 1 #define XFS_BUF_LOCK_TRACKING 1 -#define QUOTADEBUG 1 +/* #define QUOTADEBUG 1 */ #endif #ifdef CONFIG_XFS_TRACE -- cgit v1.2.3-70-g09d2 From 7155054c9d8b5974f6e788b46939b419bd5fb020 Mon Sep 17 00:00:00 2001 From: Eric Sandeen Date: Tue, 29 Apr 2008 12:53:00 +1000 Subject: [XFS] fix non-smp xfs build xfs_reserve_blocks() calls xfs_icsb_sync_counters_locked(), which is not defined if !CONFIG_SMP/!HAVE_PERCPU_SB SGI-PV: 976035 SGI-Modid: xfs-linux-melb:xfs-kern:30991a Signed-off-by: Eric Sandeen Signed-off-by: Lachlan McIlroy --- fs/xfs/xfs_mount.h | 1 + 1 file changed, 1 insertion(+) (limited to 'fs') diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index 27b558ee576..63e0693a358 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -217,6 +217,7 @@ extern void xfs_icsb_sync_counters_locked(struct xfs_mount *, int); #define xfs_icsb_init_counters(mp) (0) #define xfs_icsb_reinit_counters(mp) do { } while (0) #define xfs_icsb_sync_counters(mp, flags) do { } while (0) +#define xfs_icsb_sync_counters_locked(mp, flags) do { } while (0) #endif typedef struct xfs_ail { -- cgit v1.2.3-70-g09d2 From fe0754f0e5c0f070bf82b6e7e5e8fa5a188163fc Mon Sep 17 00:00:00 2001 From: Alexey Dobriyan Date: Tue, 29 Apr 2008 12:53:08 +1000 Subject: [XFS] remove xfs_log_ticket_zone on rmmod Fix bug introduced in commit eb01c9cd87c7a9998c2edf209721ea069e3e3652 aka "[XFS] Remove the xlog_ticket allocator" SGI-PV: 980887 SGI-Modid: xfs-linux-melb:xfs-kern:30995a Signed-off-by: Alexey Dobriyan Signed-off-by: David Chinner Signed-off-by: Lachlan McIlroy --- fs/xfs/xfs_vfsops.c | 1 + 1 file changed, 1 insertion(+) (limited to 'fs') diff --git a/fs/xfs/xfs_vfsops.c b/fs/xfs/xfs_vfsops.c index fc48158fe47..30bacd8bb0e 100644 --- a/fs/xfs/xfs_vfsops.c +++ b/fs/xfs/xfs_vfsops.c @@ -186,6 +186,7 @@ xfs_cleanup(void) kmem_zone_destroy(xfs_efi_zone); kmem_zone_destroy(xfs_ifork_zone); kmem_zone_destroy(xfs_ili_zone); + kmem_zone_destroy(xfs_log_ticket_zone); } /* -- cgit v1.2.3-70-g09d2 From d349404ff14758dc9a2d3df032073ed795085860 Mon Sep 17 00:00:00 2001 From: David Chinner Date: Tue, 29 Apr 2008 12:53:15 +1000 Subject: [XFS] Don't double count reserved block changes on UP. On uniprocessor machines, the incore superblock is used for all in memory accounting of free blocks. in this situation, changes to the reserved block count are accounted twice; once directly and once via xfs_mod_incore_sb(). Seeing as the modification on SMP is done via xfs_mod_incore_sb(), make this the only update mechanism that UP uses as well. SGI-PV: 980654 SGI-Modid: xfs-linux-melb:xfs-kern:30997a Signed-off-by: David Chinner Signed-off-by: Lachlan McIlroy --- fs/xfs/xfs_fsops.c | 4 ---- 1 file changed, 4 deletions(-) (limited to 'fs') diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c index 5d5e9b34dd0..381ebda4f7b 100644 --- a/fs/xfs/xfs_fsops.c +++ b/fs/xfs/xfs_fsops.c @@ -552,11 +552,8 @@ retry: mp->m_resblks += free; mp->m_resblks_avail += free; fdblks_delta = -free; - mp->m_sb.sb_fdblocks = XFS_ALLOC_SET_ASIDE(mp); } else { fdblks_delta = -delta; - mp->m_sb.sb_fdblocks = - lcounter + XFS_ALLOC_SET_ASIDE(mp); mp->m_resblks = request; mp->m_resblks_avail += delta; } @@ -587,7 +584,6 @@ out: if (error == ENOSPC) goto retry; } - return 0; } -- cgit v1.2.3-70-g09d2 From 86c4d62305649848164ae311a0959fc569b0d964 Mon Sep 17 00:00:00 2001 From: David Chinner Date: Tue, 29 Apr 2008 12:53:21 +1000 Subject: [XFS] Fix check for block zero access in xfs_write_iomap_allocate() The check for block zero access should be done on non-realtime inodes. Fix the logic error in xfs_write_iomap_allocate(), and simplify the logic on all checks for block zero access in xfs_iomap.c SGI-PV: 980888 SGI-Modid: xfs-linux-melb:xfs-kern:30998a Signed-off-by: David Chinner Signed-off-by: Lachlan McIlroy --- fs/xfs/xfs_iomap.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) (limited to 'fs') diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c index a2c3200a099..7edcde691d1 100644 --- a/fs/xfs/xfs_iomap.c +++ b/fs/xfs/xfs_iomap.c @@ -523,8 +523,7 @@ xfs_iomap_write_direct( goto error_out; } - if (unlikely(!imap.br_startblock && - !(XFS_IS_REALTIME_INODE(ip)))) { + if (!(imap.br_startblock || XFS_IS_REALTIME_INODE(ip))) { error = xfs_cmn_err_fsblock_zero(ip, &imap); goto error_out; } @@ -686,8 +685,7 @@ retry: goto retry; } - if (unlikely(!imap[0].br_startblock && - !(XFS_IS_REALTIME_INODE(ip)))) + if (!(imap[0].br_startblock || XFS_IS_REALTIME_INODE(ip))) return xfs_cmn_err_fsblock_zero(ip, &imap[0]); *ret_imap = imap[0]; @@ -838,9 +836,9 @@ xfs_iomap_write_allocate( * See if we were able to allocate an extent that * covers at least part of the callers request */ - if (unlikely(!imap.br_startblock && - XFS_IS_REALTIME_INODE(ip))) + if (!(imap.br_startblock || XFS_IS_REALTIME_INODE(ip))) return xfs_cmn_err_fsblock_zero(ip, &imap); + if ((offset_fsb >= imap.br_startoff) && (offset_fsb < (imap.br_startoff + imap.br_blockcount))) { @@ -934,8 +932,7 @@ xfs_iomap_write_unwritten( if (error) return XFS_ERROR(error); - if (unlikely(!imap.br_startblock && - !(XFS_IS_REALTIME_INODE(ip)))) + if (!(imap.br_startblock || XFS_IS_REALTIME_INODE(ip))) return xfs_cmn_err_fsblock_zero(ip, &imap); if ((numblks_fsb = imap.br_blockcount) == 0) { -- cgit v1.2.3-70-g09d2 From 359346a9655c8800408ed3ca44517ac7ea95c197 Mon Sep 17 00:00:00 2001 From: David Chinner Date: Tue, 29 Apr 2008 12:53:32 +1000 Subject: [XFS] Don't initialise new inode generation numbers to zero When we allocation new inode chunks, we initialise the generation numbers to zero. This works fine until we delete a chunk and then reallocate it, resulting in the same inode numbers but with a reset generation count. This can result in inode/generation pairs of different inodes occurring relatively close together. Given that the inode/gen pair makes up the "unique" portion of an NFS filehandle on XFS, this can result in file handles cached on clients being seen on the wire from the server but refer to a different file. This causes .... issues for NFS clients. Hence we need a unique generation number initialisation for each inode to prevent reuse of a small portion of the generation number space. Use a random number to initialise the generation number so we don't need to keep any new state on disk whilst making the new number difficult to guess from previous allocations. SGI-PV: 979416 SGI-Modid: xfs-linux-melb:xfs-kern:31001a Signed-off-by: David Chinner Signed-off-by: Christoph Hellwig Signed-off-by: Lachlan McIlroy --- fs/xfs/xfs_ialloc.c | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'fs') diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c index a64dfbd565a..aad8c5da38a 100644 --- a/fs/xfs/xfs_ialloc.c +++ b/fs/xfs/xfs_ialloc.c @@ -147,6 +147,7 @@ xfs_ialloc_ag_alloc( int version; /* inode version number to use */ int isaligned = 0; /* inode allocation at stripe unit */ /* boundary */ + unsigned int gen; args.tp = tp; args.mp = tp->t_mountp; @@ -290,6 +291,14 @@ xfs_ialloc_ag_alloc( else version = XFS_DINODE_VERSION_1; + /* + * Seed the new inode cluster with a random generation number. This + * prevents short-term reuse of generation numbers if a chunk is + * freed and then immediately reallocated. We use random numbers + * rather than a linear progression to prevent the next generation + * number from being easily guessable. + */ + gen = random32(); for (j = 0; j < nbufs; j++) { /* * Get the block. @@ -309,6 +318,7 @@ xfs_ialloc_ag_alloc( 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_next_unlinked = cpu_to_be32(NULLAGINO); xfs_ialloc_log_di(tp, fbuf, i, XFS_DI_CORE_BITS | XFS_DI_NEXT_UNLINKED); -- cgit v1.2.3-70-g09d2 From 7788fae6cce616fe2c624273fcfe54cf50f5c38b Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Mon, 21 Apr 2008 17:22:27 +1000 Subject: [XFS] allow enabling CONFIG_XFS_DEBUG Back when I first submitted XFS for mainline inclusion we made the decision that the debug code is far to extensive to be accidentally enabled by users in mainline. But then again it's often quite useful to track problems down and hacking the makefile all the time is rather annoying. Given all the debug options with even more overhead like lockdep or DEBUG_PAGE_ALLOC users (or rather developers) should know by now what they're doing. Signed-off-by: Christoph Hellwig Signed-off-by: Lachlan McIlroy --- fs/xfs/Kconfig | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'fs') diff --git a/fs/xfs/Kconfig b/fs/xfs/Kconfig index 524021ff543..3f53dd101f9 100644 --- a/fs/xfs/Kconfig +++ b/fs/xfs/Kconfig @@ -64,3 +64,16 @@ config XFS_RT See the xfs man page in section 5 for additional information. If unsure, say N. + +config XFS_DEBUG + bool "XFS Debugging support (EXPERIMENTAL)" + depends on XFS_FS && EXPERIMENTAL + help + Say Y here to get an XFS build with many debugging features, + including ASSERT checks, function wrappers around macros, + and extra sanity-checking functions in various code paths. + + Note that the resulting code will be HUGE and SLOW, and probably + not useful unless you are debugging a particular problem. + + Say N unless you are an XFS developer, or you play one on TV. -- cgit v1.2.3-70-g09d2 From 3a738a5c73e0617d11b27ac46dd6a1a8f752017b Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Mon, 21 Apr 2008 17:25:35 +1000 Subject: [XFS] remove sendfile leftovers Remove the last sendfile leftovers in mainline. This code is already gone in CVS. Signed-off-by: Christoph Hellwig Signed-off-by: Lachlan McIlroy --- fs/xfs/linux-2.6/xfs_lrw.h | 1 - fs/xfs/xfs_vnodeops.h | 3 --- 2 files changed, 4 deletions(-) (limited to 'fs') diff --git a/fs/xfs/linux-2.6/xfs_lrw.h b/fs/xfs/linux-2.6/xfs_lrw.h index e1d498b4ba7..e6be37dbd0e 100644 --- a/fs/xfs/linux-2.6/xfs_lrw.h +++ b/fs/xfs/linux-2.6/xfs_lrw.h @@ -50,7 +50,6 @@ struct xfs_iomap; #define XFS_INVAL_CACHED 18 #define XFS_DIORD_ENTER 19 #define XFS_DIOWR_ENTER 20 -#define XFS_SENDFILE_ENTER 21 #define XFS_WRITEPAGE_ENTER 22 #define XFS_RELEASEPAGE_ENTER 23 #define XFS_INVALIDPAGE_ENTER 24 diff --git a/fs/xfs/xfs_vnodeops.h b/fs/xfs/xfs_vnodeops.h index 827afc99700..8abe8f186e2 100644 --- a/fs/xfs/xfs_vnodeops.h +++ b/fs/xfs/xfs_vnodeops.h @@ -60,9 +60,6 @@ int xfs_ioctl(struct xfs_inode *ip, struct file *filp, ssize_t xfs_read(struct xfs_inode *ip, struct kiocb *iocb, const struct iovec *iovp, unsigned int segs, loff_t *offset, int ioflags); -ssize_t xfs_sendfile(struct xfs_inode *ip, struct file *filp, - loff_t *offset, int ioflags, size_t count, - read_actor_t actor, void *target); ssize_t xfs_splice_read(struct xfs_inode *ip, struct file *infilp, loff_t *ppos, struct pipe_inode_info *pipe, size_t count, int flags, int ioflags); -- cgit v1.2.3-70-g09d2 From c5acbaf43da139fe014d78d1f0ca7754fa856ddb Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Mon, 21 Apr 2008 18:11:13 +1000 Subject: [XFS] remove dmapi cruft in xfs_file.c The dmapi cruft in xfs_file.c is totally out of date in mainline vs CVS, and at this point just removing this code which can't be used on mainline at all seems to be the best option to keep it maintainable. Signed-off-by: Christoph Hellwig Signed-off-by: Lachlan McIlroy --- fs/xfs/linux-2.6/xfs_file.c | 75 --------------------------------------------- 1 file changed, 75 deletions(-) (limited to 'fs') diff --git a/fs/xfs/linux-2.6/xfs_file.c b/fs/xfs/linux-2.6/xfs_file.c index 05905246434..65e78c13d4a 100644 --- a/fs/xfs/linux-2.6/xfs_file.c +++ b/fs/xfs/linux-2.6/xfs_file.c @@ -43,9 +43,6 @@ #include static struct vm_operations_struct xfs_file_vm_ops; -#ifdef CONFIG_XFS_DMAPI -static struct vm_operations_struct xfs_dmapi_file_vm_ops; -#endif STATIC_INLINE ssize_t __xfs_file_read( @@ -202,22 +199,6 @@ xfs_file_fsync( (xfs_off_t)0, (xfs_off_t)-1); } -#ifdef CONFIG_XFS_DMAPI -STATIC int -xfs_vm_fault( - struct vm_area_struct *vma, - struct vm_fault *vmf) -{ - struct inode *inode = vma->vm_file->f_path.dentry->d_inode; - bhv_vnode_t *vp = vn_from_inode(inode); - - ASSERT_ALWAYS(vp->v_vfsp->vfs_flag & VFS_DMI); - if (XFS_SEND_MMAP(XFS_VFSTOM(vp->v_vfsp), vma, 0)) - return VM_FAULT_SIGBUS; - return filemap_fault(vma, vmf); -} -#endif /* CONFIG_XFS_DMAPI */ - /* * Unfortunately we can't just use the clean and simple readdir implementation * below, because nfs might call back into ->lookup from the filldir callback @@ -386,11 +367,6 @@ xfs_file_mmap( vma->vm_ops = &xfs_file_vm_ops; vma->vm_flags |= VM_CAN_NONLINEAR; -#ifdef CONFIG_XFS_DMAPI - if (XFS_M(filp->f_path.dentry->d_inode->i_sb)->m_flags & XFS_MOUNT_DMAPI) - vma->vm_ops = &xfs_dmapi_file_vm_ops; -#endif /* CONFIG_XFS_DMAPI */ - file_accessed(filp); return 0; } @@ -437,47 +413,6 @@ xfs_file_ioctl_invis( return error; } -#ifdef CONFIG_XFS_DMAPI -#ifdef HAVE_VMOP_MPROTECT -STATIC int -xfs_vm_mprotect( - struct vm_area_struct *vma, - unsigned int newflags) -{ - struct inode *inode = vma->vm_file->f_path.dentry->d_inode; - struct xfs_mount *mp = XFS_M(inode->i_sb); - int error = 0; - - if (mp->m_flags & XFS_MOUNT_DMAPI) { - if ((vma->vm_flags & VM_MAYSHARE) && - (newflags & VM_WRITE) && !(vma->vm_flags & VM_WRITE)) - error = XFS_SEND_MMAP(mp, vma, VM_WRITE); - } - return error; -} -#endif /* HAVE_VMOP_MPROTECT */ -#endif /* CONFIG_XFS_DMAPI */ - -#ifdef HAVE_FOP_OPEN_EXEC -/* If the user is attempting to execute a file that is offline then - * we have to trigger a DMAPI READ event before the file is marked as busy - * otherwise the invisible I/O will not be able to write to the file to bring - * it back online. - */ -STATIC int -xfs_file_open_exec( - struct inode *inode) -{ - struct xfs_mount *mp = XFS_M(inode->i_sb); - struct xfs_inode *ip = XFS_I(inode); - - if (unlikely(mp->m_flags & XFS_MOUNT_DMAPI) && - DM_EVENT_ENABLED(ip, DM_EVENT_READ)) - return -XFS_SEND_DATA(mp, DM_EVENT_READ, ip, 0, 0, 0, NULL); - return 0; -} -#endif /* HAVE_FOP_OPEN_EXEC */ - /* * mmap()d file has taken write protection fault and is being made * writable. We can set the page state up correctly for a writable @@ -546,13 +481,3 @@ static struct vm_operations_struct xfs_file_vm_ops = { .fault = filemap_fault, .page_mkwrite = xfs_vm_page_mkwrite, }; - -#ifdef CONFIG_XFS_DMAPI -static struct vm_operations_struct xfs_dmapi_file_vm_ops = { - .fault = xfs_vm_fault, - .page_mkwrite = xfs_vm_page_mkwrite, -#ifdef HAVE_VMOP_MPROTECT - .mprotect = xfs_vm_mprotect, -#endif -}; -#endif /* CONFIG_XFS_DMAPI */ -- cgit v1.2.3-70-g09d2 From adaa693b845373296631766176ebf0f73a342e10 Mon Sep 17 00:00:00 2001 From: Stephen Rothwell Date: Tue, 22 Apr 2008 15:26:13 +1000 Subject: [XFS] Fix build failure after enabling CONFIG_XFS_DEBUG Signed-off-by: Stephen Rothwell Signed-off-by: Lachlan McIlroy --- fs/xfs/linux-2.6/xfs_buf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs') diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c index 52f6846101d..5105015a75a 100644 --- a/fs/xfs/linux-2.6/xfs_buf.c +++ b/fs/xfs/linux-2.6/xfs_buf.c @@ -886,7 +886,7 @@ int xfs_buf_lock_value( xfs_buf_t *bp) { - return atomic_read(&bp->b_sema.count); + return bp->b_sema.count; } #endif -- cgit v1.2.3-70-g09d2