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authorDavid Chinner <dgc@sgi.com>2007-05-24 15:22:19 +1000
committerTim Shimmin <tes@chook.melbourne.sgi.com>2007-07-14 15:23:40 +1000
commit92dfe8d266eaf35a50607a0e0dcf525e1d367c80 (patch)
treea9149b1bcad2142b14b8b25c06c64a0ae7399f64 /fs/xfs/xfs_rw.h
parent511105b3d7c2440ee84fc3f90d200569aac88162 (diff)
[XFS] Make hole punching at EOF atomic.
If hole punching at EOF is done as two steps (i.e. truncate then extend) the file is in a transient state between the two steps where an application can see the incorrect file size. Punching a hole to EOF needs to be treated in teh same way as all other hole punching cases so that the file size is never seen to change. SGI-PV: 962012 SGI-Modid: xfs-linux-melb:xfs-kern:28641a Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Vlad Apostolov <vapo@sgi.com> Signed-off-by: Tim Shimmin <tes@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_rw.h')
-rw-r--r--fs/xfs/xfs_rw.h14
1 files changed, 11 insertions, 3 deletions
diff --git a/fs/xfs/xfs_rw.h b/fs/xfs/xfs_rw.h
index 188b296ff50c..ba74000931ec 100644
--- a/fs/xfs/xfs_rw.h
+++ b/fs/xfs/xfs_rw.h
@@ -72,6 +72,12 @@ xfs_fsb_to_db_io(struct xfs_iocore *io, xfs_fsblock_t fsb)
}
/*
+ * Flags for xfs_free_eofblocks
+ */
+#define XFS_FREE_EOF_LOCK (1<<0)
+#define XFS_FREE_EOF_NOLOCK (1<<1)
+
+/*
* Prototypes for functions in xfs_rw.c.
*/
extern int xfs_write_clear_setuid(struct xfs_inode *ip);
@@ -91,10 +97,12 @@ extern void xfs_ioerror_alert(char *func, struct xfs_mount *mp,
extern int xfs_rwlock(bhv_desc_t *bdp, bhv_vrwlock_t write_lock);
extern void xfs_rwunlock(bhv_desc_t *bdp, bhv_vrwlock_t write_lock);
extern int xfs_setattr(bhv_desc_t *, bhv_vattr_t *vap, int flags,
- cred_t *credp);
+ cred_t *credp);
extern int xfs_change_file_space(bhv_desc_t *bdp, int cmd, xfs_flock64_t *bf,
- xfs_off_t offset, cred_t *credp, int flags);
+ xfs_off_t offset, cred_t *credp, int flags);
extern int xfs_set_dmattrs(bhv_desc_t *bdp, u_int evmask, u_int16_t state,
- cred_t *credp);
+ cred_t *credp);
+extern int xfs_free_eofblocks(struct xfs_mount *mp, struct xfs_inode *ip,
+ int flags);
#endif /* __XFS_RW_H__ */