The patch titled
Subject: Documentation: update nfs option in filesystem/vfat.txt
has been removed from the -mm tree. Its filename was
documentation-update-nfs-option-in-filesystem-vfattxt.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Namjae Jeon <namjae.jeon@xxxxxxxxxxx>
Subject: Documentation: update nfs option in filesystem/vfat.txt
Add descriptions about 'stale_rw' and 'nostale_ro' nfs options in
filesystem/vfat.txt
Signed-off-by: Namjae Jeon <namjae.jeon@xxxxxxxxxxx>
Signed-off-by: Ravishankar N <ravi.n1@xxxxxxxxxxx>
Signed-off-by: Amit Sahrawat <a.sahrawat@xxxxxxxxxxx>
Acked-by: OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
Acked-by: Rob Landley <rob@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/filesystems/vfat.txt | 26 +++++++++++++++++++++-----
1 file changed, 21 insertions(+), 5 deletions(-)
diff -puN Documentation/filesystems/vfat.txt~documentation-update-nfs-option-in-filesystem-vfattxt Documentation/filesystems/vfat.txt
--- a/Documentation/filesystems/vfat.txt~documentation-update-nfs-option-in-filesystem-vfattxt
+++ a/Documentation/filesystems/vfat.txt
@@ -150,12 +150,28 @@ discard -- If set, issues discard/
device when blocks are freed. This is useful for SSD devices
and sparse/thinly-provisoned LUNs.
-nfs -- This option maintains an index (cache) of directory
- inodes by i_logstart which is used by the nfs-related code to
- improve look-ups.
+nfs=stale_rw|nostale_ro
+ Enable this only if you want to export the FAT filesystem
+ over NFS.
+
+ stale_rw: This option maintains an index (cache) of directory
+ inodes by i_logstart which is used by the nfs-related code to
+ improve look-ups. Full file operations (read/write) over NFS is
+ supported but with cache eviction at NFS server, this could
+ result in ESTALE issues.
+
+ nostale_ro: This option bases the inode number and filehandle
+ on the on-disk location of a file in the MS-DOS directory entry.
+ This ensures that ESTALE will not be returned after a file is
+ evicted from the inode cache. However, it means that operations
+ such as rename, create and unlink could cause filehandles that
+ previously pointed at one file to point at a different file,
+ potentially causing data corruption. For this reason, this
+ option also mounts the filesystem readonly.
+
+ To maintain backward compatibility, '-o nfs' is also accepted,
+ defaulting to stale_rw
- Enable this only if you want to export the FAT filesystem
- over NFS
<bool>: 0,1,yes,no,true,false
_
Patches currently in -mm which might be from namjae.jeon@xxxxxxxxxxx are
origin.patch
linux-next.patch
fat-additions-to-support-fat_fallocate.patch
fat-additions-to-support-fat_fallocate-fix.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
