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[XFS] Don't update i_size for directories and special files 

The core kernel uses vfs_getattr to look at the inode size and similar
attributes, so there is no need to keep i_size uptodate for directories or
special files. This means we can remove xfs_validate_fields because the
I/O path already keeps i_size uptodate for regular files.

SGI-PV: 981498

SGI-Modid: xfs-linux-melb:xfs-kern:31336a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Barry Naujok <bnaujok@sgi.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
This commit is contained in:
Christoph Hellwig 2008-06-23 13:25:25 +10:00 committed by Niv Sardi
parent 8f112e3bc3
commit e5700704b2
1 changed files with 13 additions and 48 deletions
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61
fs/xfs/linux-2.6/xfs_iops.c
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@ -181,23 +181,6 @@ xfs_ichgtime_fast(
mark_inode_dirty_sync(inode);
}
/*
* Pull the link count and size up from the xfs inode to the linux inode
*/
STATIC void
xfs_validate_fields(
struct inode *inode)
{
struct xfs_inode *ip = XFS_I(inode);
loff_t size;
/* we're under i_sem so i_size can't change under us */
size = XFS_ISIZE(ip);
if (i_size_read(inode) != size)
i_size_write(inode, size);
}
/*
* Hook in SELinux. This is not quite correct yet, what we really need
* here (as we do for default ACLs) is a mechanism by which creation of
@ -331,10 +314,7 @@ xfs_vn_mknod(
}
if (S_ISDIR(mode))
xfs_validate_fields(inode);
d_instantiate(dentry, inode);
xfs_validate_fields(dir);
return -error;
out_cleanup_inode:
@ -450,7 +430,6 @@ xfs_vn_link(
}
xfs_iflags_set(XFS_I(dir), XFS_IMODIFIED);
xfs_validate_fields(inode);
d_instantiate(dentry, inode);
return 0;
}
@ -460,26 +439,23 @@ xfs_vn_unlink(
struct inode *dir,
struct dentry *dentry)
{
struct inode *inode;
struct xfs_name name;
int error;
inode = dentry->d_inode;
xfs_dentry_to_name(&name, dentry);
error = xfs_remove(XFS_I(dir), &name, XFS_I(inode));
if (likely(!error)) {
xfs_validate_fields(dir); /* size needs update */
xfs_validate_fields(inode);
/*
* With unlink, the VFS makes the dentry "negative": no inode,
* but still hashed. This is incompatible with case-insensitive
* mode, so invalidate (unhash) the dentry in CI-mode.
*/
if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb))
d_invalidate(dentry);
}
return -error;
error = -xfs_remove(XFS_I(dir), &name, XFS_I(dentry->d_inode));
if (error)
return error;
/*
* With unlink, the VFS makes the dentry "negative": no inode,
* but still hashed. This is incompatible with case-insensitive
* mode, so invalidate (unhash) the dentry in CI-mode.
*/
if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb))
d_invalidate(dentry);
return 0;
}
STATIC int
@ -509,8 +485,6 @@ xfs_vn_symlink(
goto out_cleanup_inode;
d_instantiate(dentry, inode);
xfs_validate_fields(dir);
xfs_validate_fields(inode);
return 0;
out_cleanup_inode:
@ -529,22 +503,13 @@ xfs_vn_rename(
struct inode *new_inode = ndentry->d_inode;
struct xfs_name oname;
struct xfs_name nname;
int error;
xfs_dentry_to_name(&oname, odentry);
xfs_dentry_to_name(&nname, ndentry);
error = xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode),
return -xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode),
XFS_I(ndir), &nname, new_inode ?
XFS_I(new_inode) : NULL);
if (likely(!error)) {
if (new_inode)
xfs_validate_fields(new_inode);
xfs_validate_fields(odir);
if (ndir != odir)
xfs_validate_fields(ndir);
}
return -error;
}
/*