diff options
author | Dave Chinner <dchinner@redhat.com> | 2016-02-09 16:54:58 +1100 |
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committer | Dave Chinner <david@fromorbit.com> | 2016-02-09 16:54:58 +1100 |
commit | 54d7b5c1d03e9711cce2d72237d5b3f5c87431f4 (patch) | |
tree | 217051439807a7bc0fba823d0319c7a5900cc2c3 /fs/xfs | |
parent | 50997470ef95fd8ae0ef6acab3b2e1d886ae2445 (diff) | |
download | linux-54d7b5c1d03e9711cce2d72237d5b3f5c87431f4.tar.gz linux-54d7b5c1d03e9711cce2d72237d5b3f5c87431f4.tar.bz2 linux-54d7b5c1d03e9711cce2d72237d5b3f5c87431f4.zip |
xfs: use vfs inode nlink field everywhere
The VFS tracks the inode nlink just like the xfs_icdinode. We can
remove the variable from the icdinode and use the VFS inode variable
everywhere, reducing the size of the xfs_icdinode by a further 4
bytes.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs')
-rw-r--r-- | fs/xfs/libxfs/xfs_inode_buf.c | 6 | ||||
-rw-r--r-- | fs/xfs/libxfs/xfs_inode_buf.h | 1 | ||||
-rw-r--r-- | fs/xfs/xfs_icache.c | 2 | ||||
-rw-r--r-- | fs/xfs/xfs_inode.c | 77 | ||||
-rw-r--r-- | fs/xfs/xfs_inode.h | 2 | ||||
-rw-r--r-- | fs/xfs/xfs_inode_item.c | 2 | ||||
-rw-r--r-- | fs/xfs/xfs_iops.c | 3 | ||||
-rw-r--r-- | fs/xfs/xfs_itable.c | 2 | ||||
-rw-r--r-- | fs/xfs/xfs_log_recover.c | 2 |
9 files changed, 43 insertions, 54 deletions
diff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c index fe8f4f349b37..cc509c1af75e 100644 --- a/fs/xfs/libxfs/xfs_inode_buf.c +++ b/fs/xfs/libxfs/xfs_inode_buf.c @@ -210,12 +210,12 @@ xfs_inode_from_disk( * minimum inode version format we support in the rest of the code. */ if (to->di_version == 1) { - to->di_nlink = be16_to_cpu(from->di_onlink); + set_nlink(inode, be16_to_cpu(from->di_onlink)); to->di_projid_lo = 0; to->di_projid_hi = 0; to->di_version = 2; } else { - to->di_nlink = be32_to_cpu(from->di_nlink); + set_nlink(inode, be32_to_cpu(from->di_nlink)); to->di_projid_lo = be16_to_cpu(from->di_projid_lo); to->di_projid_hi = be16_to_cpu(from->di_projid_hi); } @@ -275,7 +275,6 @@ xfs_inode_to_disk( to->di_format = from->di_format; to->di_uid = cpu_to_be32(from->di_uid); to->di_gid = cpu_to_be32(from->di_gid); - to->di_nlink = cpu_to_be32(from->di_nlink); to->di_projid_lo = cpu_to_be16(from->di_projid_lo); to->di_projid_hi = cpu_to_be16(from->di_projid_hi); @@ -286,6 +285,7 @@ xfs_inode_to_disk( to->di_mtime.t_nsec = cpu_to_be32(inode->i_mtime.tv_nsec); to->di_ctime.t_sec = cpu_to_be32(inode->i_ctime.tv_sec); to->di_ctime.t_nsec = cpu_to_be32(inode->i_ctime.tv_nsec); + to->di_nlink = cpu_to_be32(inode->i_nlink); to->di_size = cpu_to_be64(from->di_size); to->di_nblocks = cpu_to_be64(from->di_nblocks); diff --git a/fs/xfs/libxfs/xfs_inode_buf.h b/fs/xfs/libxfs/xfs_inode_buf.h index 73ba1d8ffac2..320b72344270 100644 --- a/fs/xfs/libxfs/xfs_inode_buf.h +++ b/fs/xfs/libxfs/xfs_inode_buf.h @@ -34,7 +34,6 @@ struct xfs_icdinode { __uint16_t di_flushiter; /* incremented on flush */ __uint32_t di_uid; /* owner's user id */ __uint32_t di_gid; /* owner's group id */ - __uint32_t di_nlink; /* number of links to file */ __uint16_t di_projid_lo; /* lower part of owner's project id */ __uint16_t di_projid_hi; /* higher part of owner's project id */ xfs_fsize_t di_size; /* number of bytes in file */ diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c index 9ca2865575ab..4c184f70d43c 100644 --- a/fs/xfs/xfs_icache.c +++ b/fs/xfs/xfs_icache.c @@ -148,9 +148,11 @@ xfs_reinit_inode( struct inode *inode) { int error; + uint32_t nlink = inode->i_nlink; error = inode_init_always(mp->m_super, inode); + set_nlink(inode, nlink); return error; } diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 7d9c514fd231..18b3bc0c211a 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -57,9 +57,9 @@ kmem_zone_t *xfs_inode_zone; */ #define XFS_ITRUNC_MAX_EXTENTS 2 -STATIC int xfs_iflush_int(xfs_inode_t *, xfs_buf_t *); - -STATIC int xfs_iunlink_remove(xfs_trans_t *, xfs_inode_t *); +STATIC int xfs_iflush_int(struct xfs_inode *, struct xfs_buf *); +STATIC int xfs_iunlink(struct xfs_trans *, struct xfs_inode *); +STATIC int xfs_iunlink_remove(struct xfs_trans *, struct xfs_inode *); /* * helper function to extract extent size hint from inode @@ -803,7 +803,7 @@ xfs_ialloc( ip->i_d.di_version = 2; ip->i_d.di_mode = mode; - ip->i_d.di_nlink = nlink; + set_nlink(inode, nlink); ip->i_d.di_uid = xfs_kuid_to_uid(current_fsuid()); ip->i_d.di_gid = xfs_kgid_to_gid(current_fsgid()); xfs_set_projid(ip, prid); @@ -1086,35 +1086,24 @@ xfs_dir_ialloc( } /* - * Decrement the link count on an inode & log the change. - * If this causes the link count to go to zero, initiate the - * logging activity required to truncate a file. + * Decrement the link count on an inode & log the change. If this causes the + * link count to go to zero, move the inode to AGI unlinked list so that it can + * be freed when the last active reference goes away via xfs_inactive(). */ int /* error */ xfs_droplink( xfs_trans_t *tp, xfs_inode_t *ip) { - int error; - xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); - ASSERT (ip->i_d.di_nlink > 0); - ip->i_d.di_nlink--; drop_nlink(VFS_I(ip)); xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); - error = 0; - if (ip->i_d.di_nlink == 0) { - /* - * We're dropping the last link to this file. - * Move the on-disk inode to the AGI unlinked list. - * From xfs_inactive() we will pull the inode from - * the list and free it. - */ - error = xfs_iunlink(tp, ip); - } - return error; + if (VFS_I(ip)->i_nlink) + return 0; + + return xfs_iunlink(tp, ip); } /* @@ -1128,8 +1117,6 @@ xfs_bumplink( xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); ASSERT(ip->i_d.di_version > 1); - ASSERT(ip->i_d.di_nlink > 0 || (VFS_I(ip)->i_state & I_LINKABLE)); - ip->i_d.di_nlink++; inc_nlink(VFS_I(ip)); xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); return 0; @@ -1387,7 +1374,6 @@ xfs_create_tmpfile( */ xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp, pdqp); - ip->i_d.di_nlink--; error = xfs_iunlink(tp, ip); if (error) goto out_trans_cancel; @@ -1486,7 +1472,10 @@ xfs_link( xfs_bmap_init(&free_list, &first_block); - if (sip->i_d.di_nlink == 0) { + /* + * Handle initial link state of O_TMPFILE inode + */ + if (VFS_I(sip)->i_nlink == 0) { error = xfs_iunlink_remove(tp, sip); if (error) goto error_return; @@ -1673,7 +1662,7 @@ xfs_release( } } - if (ip->i_d.di_nlink == 0) + if (VFS_I(ip)->i_nlink == 0) return 0; if (xfs_can_free_eofblocks(ip, false)) { @@ -1889,7 +1878,7 @@ xfs_inactive( if (mp->m_flags & XFS_MOUNT_RDONLY) return; - if (ip->i_d.di_nlink != 0) { + if (VFS_I(ip)->i_nlink != 0) { /* * force is true because we are evicting an inode from the * cache. Post-eof blocks must be freed, lest we end up with @@ -1946,16 +1935,21 @@ xfs_inactive( } /* - * This is called when the inode's link count goes to 0. - * We place the on-disk inode on a list in the AGI. It - * will be pulled from this list when the inode is freed. + * This is called when the inode's link count goes to 0 or we are creating a + * tmpfile via O_TMPFILE. In the case of a tmpfile, @ignore_linkcount will be + * set to true as the link count is dropped to zero by the VFS after we've + * created the file successfully, so we have to add it to the unlinked list + * while the link count is non-zero. + * + * We place the on-disk inode on a list in the AGI. It will be pulled from this + * list when the inode is freed. */ -int +STATIC int xfs_iunlink( - xfs_trans_t *tp, - xfs_inode_t *ip) + struct xfs_trans *tp, + struct xfs_inode *ip) { - xfs_mount_t *mp; + xfs_mount_t *mp = tp->t_mountp; xfs_agi_t *agi; xfs_dinode_t *dip; xfs_buf_t *agibp; @@ -1965,11 +1959,8 @@ xfs_iunlink( int offset; int error; - ASSERT(ip->i_d.di_nlink == 0); ASSERT(ip->i_d.di_mode != 0); - mp = tp->t_mountp; - /* * Get the agi buffer first. It ensures lock ordering * on the list. @@ -2406,7 +2397,7 @@ xfs_ifree( struct xfs_icluster xic = { 0 }; ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); - ASSERT(ip->i_d.di_nlink == 0); + ASSERT(VFS_I(ip)->i_nlink == 0); ASSERT(ip->i_d.di_nextents == 0); ASSERT(ip->i_d.di_anextents == 0); ASSERT(ip->i_d.di_size == 0 || !S_ISREG(ip->i_d.di_mode)); @@ -2574,8 +2565,8 @@ xfs_remove( * If we're removing a directory perform some additional validation. */ if (is_dir) { - ASSERT(ip->i_d.di_nlink >= 2); - if (ip->i_d.di_nlink != 2) { + ASSERT(VFS_I(ip)->i_nlink >= 2); + if (VFS_I(ip)->i_nlink != 2) { error = -ENOTEMPTY; goto out_trans_cancel; } @@ -3031,7 +3022,7 @@ xfs_rename( * Make sure target dir is empty. */ if (!(xfs_dir_isempty(target_ip)) || - (target_ip->i_d.di_nlink > 2)) { + (VFS_I(target_ip)->i_nlink > 2)) { error = -EEXIST; goto out_trans_cancel; } @@ -3138,7 +3129,7 @@ xfs_rename( * intermediate state on disk. */ if (wip) { - ASSERT(VFS_I(wip)->i_nlink == 0 && wip->i_d.di_nlink == 0); + ASSERT(VFS_I(wip)->i_nlink == 0); error = xfs_bumplink(tp, wip); if (error) goto out_bmap_cancel; diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index aef5452b1a90..e74d13d3076b 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -405,8 +405,6 @@ int xfs_ifree(struct xfs_trans *, xfs_inode_t *, struct xfs_bmap_free *); int xfs_itruncate_extents(struct xfs_trans **, struct xfs_inode *, int, xfs_fsize_t); -int xfs_iunlink(struct xfs_trans *, xfs_inode_t *); - void xfs_iext_realloc(xfs_inode_t *, int, int); void xfs_iunpin_wait(xfs_inode_t *); diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c index 1e5ecbc45459..193e0bdec340 100644 --- a/fs/xfs/xfs_inode_item.c +++ b/fs/xfs/xfs_inode_item.c @@ -338,7 +338,6 @@ xfs_inode_to_log_dinode( to->di_format = from->di_format; to->di_uid = from->di_uid; to->di_gid = from->di_gid; - to->di_nlink = from->di_nlink; to->di_projid_lo = from->di_projid_lo; to->di_projid_hi = from->di_projid_hi; @@ -350,6 +349,7 @@ xfs_inode_to_log_dinode( to->di_mtime.t_nsec = inode->i_mtime.tv_nsec; to->di_ctime.t_sec = inode->i_ctime.tv_sec; to->di_ctime.t_nsec = inode->i_ctime.tv_nsec; + to->di_nlink = inode->i_nlink; to->di_size = from->di_size; to->di_nblocks = from->di_nblocks; diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c index cd27c6d56dfc..8982e56e07c4 100644 --- a/fs/xfs/xfs_iops.c +++ b/fs/xfs/xfs_iops.c @@ -460,7 +460,7 @@ xfs_vn_getattr( stat->size = XFS_ISIZE(ip); stat->dev = inode->i_sb->s_dev; stat->mode = ip->i_d.di_mode; - stat->nlink = ip->i_d.di_nlink; + stat->nlink = inode->i_nlink; stat->uid = inode->i_uid; stat->gid = inode->i_gid; stat->ino = ip->i_ino; @@ -1216,7 +1216,6 @@ xfs_setup_inode( hlist_add_fake(&inode->i_hash); inode->i_mode = ip->i_d.di_mode; - set_nlink(inode, ip->i_d.di_nlink); inode->i_uid = xfs_uid_to_kuid(ip->i_d.di_uid); inode->i_gid = xfs_gid_to_kgid(ip->i_d.di_gid); diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c index 2acda42319f5..cfb65273d361 100644 --- a/fs/xfs/xfs_itable.c +++ b/fs/xfs/xfs_itable.c @@ -85,7 +85,6 @@ xfs_bulkstat_one_int( /* xfs_iget returns the following without needing * further change. */ - buf->bs_nlink = dic->di_nlink; buf->bs_projid_lo = dic->di_projid_lo; buf->bs_projid_hi = dic->di_projid_hi; buf->bs_ino = ino; @@ -94,6 +93,7 @@ xfs_bulkstat_one_int( buf->bs_gid = dic->di_gid; buf->bs_size = dic->di_size; + buf->bs_nlink = inode->i_nlink; buf->bs_atime.tv_sec = inode->i_atime.tv_sec; buf->bs_atime.tv_nsec = inode->i_atime.tv_nsec; buf->bs_mtime.tv_sec = inode->i_mtime.tv_sec; diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index 4b79cf006589..611c25cdb15c 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -4337,7 +4337,7 @@ xlog_recover_process_one_iunlink( if (error) goto fail_iput; - ASSERT(ip->i_d.di_nlink == 0); + ASSERT(VFS_I(ip)->i_nlink == 0); ASSERT(ip->i_d.di_mode != 0); /* setup for the next pass */ |