kernel.git/fs/cifs/README, branch linux-2.6.28.y

[CIFS] improve setlease handling

2008-10-23T04:42:37Z

fcntl(F_SETLEASE) currently is not exported by cifs (nor by local file systems) so cifs grants leases based on how other local processes have opened the file not by whether the file is cacheable (oplocked). This adds the check to make sure that the file is cacheable on the client before checking whether we can grant the lease locally (generic_setlease). It also adds a mount option for cifs (locallease) if the user wants to override this and try to grant leases even if the server did not grant oplock. Signed-off-by: Steve French

[CIFS] Add nodfs mount option

2008-10-16T18:35:21Z

Older samba server (eg. 3.0.24 from Debian etch) don't work correctly, if DFS paths are used. Such server claim that they support DFS, but fail to process some requests with DFS paths. Starting with Linux 2.6.26, the cifs clients starts sending DFS paths in such situations, rendering it unuseable with older samba servers. The nodfs mount options forces a share to be used with non DFS paths, even if the server claims, that it supports it. Signed-off-by: Martin Koegler Acked-by: Jeff Layton Acked-by: Igor Mammedov Signed-off-by: Steve French

[CIFS] update cifs change log

2008-08-28T15:30:06Z

Signed-off-by: Steve French

[CIFS] Kerberos support not considered experimental anymore

2008-08-19T20:51:09Z

Acked-by: Jeff Layton Signed-off-by: Steve French

[CIFS] enable parsing for transport encryption mount parm

2008-05-15T16:44:38Z

Samba now supports transport encryption on particular exports (mounted tree ids can be encrypted for servers which support the unix extensions). This adds parsing support to cifs mount option parsing for this. Signed-off-by: Steve French

[CIFS] Add various missing flags and defintions

2008-04-17T23:41:01Z

Signed-off-by: Steve French

[CIFS] reduce checkpatch warnings

2008-02-07T23:25:02Z

Signed-off-by: Steve French

[CIFS] fix checkpatch warnings in fs/cifs/inode.c

2008-01-08T23:18:22Z

Signed-off-by: Steve French

[CIFS] Fix potential data corruption when writing out cached dirty pages

2007-11-20T23:19:03Z

Fix RedHat bug 329431 The idea here is separate "conscious" from "unconscious" flushes. Conscious flushes are those due to a fsync() or close(). Unconscious ones are flushes that occur as a side effect of some other operation or due to memory pressure. Currently, when an error occurs during an unconscious flush (ENOSPC or EIO), we toss out the page and don't preserve that error to report to the user when a conscious flush occurs. If after the unconscious flush, there are no more dirty pages for the inode, the conscious flush will simply return success even though there were previous errors when writing out pages. This can lead to data corruption. The easiest way to reproduce this is to mount up a CIFS share that's very close to being full or where the user is very close to quota. mv a file to the share that's slightly larger than the quota allows. The writes will all succeed (since they go to pagecache). The mv will do a setattr to set the new file's attributes. This calls filemap_write_and_wait, which will return an error since all of the pages can't be written out. Then later, when the flush and release ops occur, there are no more dirty pages in pagecache for the file and those operations return 0. mv then assumes that the file was written out correctly and deletes the original. CIFS already has a write_behind_rc variable where it stores the results from earlier flushes, but that value is only reported in cifs_close. Since the VFS ignores the return value from the release operation, this isn't helpful. We should be reporting this error during the flush operation. This patch does the following: 1) changes cifs_fsync to use filemap_write_and_wait and cifs_flush and also sync to check its return code. If it returns successful, they then check the value of write_behind_rc to see if an earlier flush had reported any errors. If so, they return that error and clear write_behind_rc. 2) sets write_behind_rc in a few other places where pages are written out as a side effect of other operations and the code waits on them. 3) changes cifs_setattr to only call filemap_write_and_wait for ATTR_SIZE changes. 4) makes cifs_writepages accurately distinguish between EIO and ENOSPC errors when writing out pages. Some simple testing indicates that the patch works as expected and that it fixes the reproduceable known problem. Acked-by: Dave Kleikamp Signed-off-by: Jeff Layton Signed-off-by: Steve French

[CIFS] Check return code on failed alloc

2007-08-18T00:15:20Z

Signed-off-by: Cyrill Gorcunov Signed-off-by: Steve French