23 Jul, 2011
2 commits
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This make sure we don't end up reusing the unlinked inode object.
The ideal way is to use inode i_generation. But i_generation is
not available in userspace always.Signed-off-by: Aneesh Kumar K.V
Signed-off-by: Eric Van Hensbergen -
This make sure we don't use wrong inode from the inode hash. The inode number
of the file deleted is reused by the next file system object created
and if we only use inode number for inode hash lookup we could end up
with wrong struct inode.Also compare inode generation number. Not all Linux file system provide
st_gen in userspace. So it could be 0;Signed-off-by: Aneesh Kumar K.V
Signed-off-by: Eric Van Hensbergen
16 Apr, 2011
1 commit
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Now that we use write_inode to flush server
cache related to fid, we don't need tsyncfs either fort dotl or dotu
protocols. For dotu this helps to do a more efficient server flush.Signed-off-by: Aneesh Kumar K.V
Signed-off-by: Venkateswararao Jujjuri
Signed-off-by: Eric Van Hensbergen
23 Mar, 2011
2 commits
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Add the new static inline and use the same
Signed-off-by: Aneesh Kumar K.V
Signed-off-by: Venkateswararao Jujjuri
Signed-off-by: Eric Van Hensbergen -
When two process open the same file we can end up with both of them
allocating the writeback_fid. Add a new mutex which can be used
for synchronizing v9fs_inode member values.Signed-off-by: Aneesh Kumar K.V
Signed-off-by: Venkateswararao Jujjuri
Signed-off-by: Eric Van Hensbergen
15 Mar, 2011
6 commits
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Add necessary #ifndef #endif blocks to avoid mulitple inclusion of same headers
Signed-off-by: Aneesh Kumar K.V
Signed-off-by: Venkateswararao Jujjuri
Signed-off-by: Eric Van Hensbergen -
With cached mode some of the file system operation result
in updating inode attributes (ctime). Add support for
marking inode attribute invalid in such cases so that
we fetch the updated inode attribute on dentry revalidation.Signed-off-by: Aneesh Kumar K.V
Signed-off-by: Venkateswararao Jujjuri
Signed-off-by: Eric Van Hensbergen -
Signed-off-by: Aneesh Kumar K.V
Signed-off-by: Venkateswararao Jujjuri
Signed-off-by: Eric Van Hensbergen -
Switch to the fscache code to v9fs_inode. We will later use
v9fs_inode in cache=loose mode to track the inode cache
validity timeout. Ie if we find an inode in cache older
that a specific jiffie range we will consider it staleSigned-off-by: Aneesh Kumar K.V
Signed-off-by: Venkateswararao Jujjuri
Signed-off-by: Eric Van Hensbergen -
FIXME!! what about dotu ?
Signed-off-by: Aneesh Kumar K.V
Signed-off-by: Venkateswararao Jujjuri
Signed-off-by: Eric Van Hensbergen -
The mount option access=client is overloaded as it assumes acl too.
Adding posixacl option to enable POSIX ACLs makes it explicit and clear.
Also it is convenient in the future to add other types of acls like richacls.Ideally, the access mode 'client' should be just like V9FS_ACCESS_USER
except it underscores the location of access check.
Traditional 9P protocol lets the server perform access checks but with
this mode, all the access checks will be performed on the client itself.
Server just follows the client's directive.Signed-off-by: Venkateswararao Jujjuri
Signed-off-by: Eric Van Hensbergen
11 Jan, 2011
1 commit
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Source Code Reorganization
Signed-off-by: Aneesh Kumar K.V
Signed-off-by: Venkateswararao Jujjuri
Signed-off-by: Eric Van Hensbergen
28 Oct, 2010
2 commits
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Use V9FS_MAGIC as the file system type while filling kernel statfs
strucutre instead of using host file system magic number. Also move
the definition of V9FS_MAGIC from v9fs.h to standard magic.h file.Signed-off-by: M. Mohan Kumar
Signed-off-by: Venkateswararao Jujjuri
Signed-off-by: Eric Van Hensbergen -
Signed-off-by: Aneesh Kumar K.V
Signed-off-by: Venkateswararao Jujjuri
Signed-off-by: Eric Van Hensbergen
03 Aug, 2010
1 commit
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During fid lookup we need to make sure that the dentry->d_parent doesn't
change so that we can safely walk the parent dentries. To ensure that
we need to prevent cross directory rename during fid_lookup. Add a
per superblock rename_sem rw_semaphore to prevent parallel fid lookup and
rename.Signed-off-by: Aneesh Kumar K.V
Signed-off-by: Venkateswararao Jujjuri
Signed-off-by: Eric Van Hensbergen
22 Apr, 2010
1 commit
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This ensures that dirty data gets flushed properly.
Signed-off-by: Jens Axboe
05 Apr, 2010
1 commit
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dcache prune happen on umount. So we cannot mark the client
satus disconnect. That will prevent a 9p call to the serverSigned-off-by: Aneesh Kumar K.V
Signed-off-by: Eric Van Hensbergen
13 Mar, 2010
1 commit
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This patch changes the name of the new 9P protocol from 9p2010.L to
9p2000.u. This is because we learnt that the name 9p2010 is already
being used by others.Signed-off-by: Sripathi Kodi
Signed-off-by: Eric Van Hensbergen
06 Mar, 2010
1 commit
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Add 9P2000.u and 9P2010.L protocol flags to V9FS VFS
This patch adds 9P2000.u and 9P2010.L protocol flags into V9FS VFS side code
and removes the single flag used for 'extended'.Signed-off-by: Sripathi Kodi
Signed-off-by: Eric Van Hensbergen
24 Sep, 2009
1 commit
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This patch adds a persistent, read-only caching facility for
9p clients using the FS-Cache caching backend.When the fscache facility is enabled, each inode is associated
with a corresponding vcookie which is an index into the FS-Cache
indexing tree. The FS-Cache indexing tree is indexed at 3 levels:
- session object associated with each mount.
- inode/vcookie
- actual data (pages)A cache tag is chosen randomly for each session. These tags can
be read off /sys/fs/9p/caches and can be passed as a mount-time
parameter to re-attach to the specified caching session.Signed-off-by: Abhishek Kulkarni
Signed-off-by: Eric Van Hensbergen
18 Aug, 2009
1 commit
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The mount options string is saved in sb->s_options. This patch removes
the redundant duplicating of the mount options. Also, since we are not
displaying anything special in show options, we replace v9fs_show_options
with generic_show_options for now.Signed-off-by: Abhishek Kulkarni
Signed-off-by: Eric Van Hensbergen
15 May, 2008
1 commit
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The kernel-doc comments of much of the 9p system have been in disarray since
reorganization. This patch fixes those problems, adds additional documentation
and a template book which collects the 9p information.Signed-off-by: Eric Van Hensbergen
07 Feb, 2008
1 commit
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This merges the mux.c (including the connection interface) with trans_fd
in preparation for transport API changes. Ultimately, trans_fd will need
to be rewritten to clean it up and simplify the implementation, but this
reorganization is viewed as the first step.Signed-off-by: Eric Van Hensbergen
18 Oct, 2007
4 commits
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The 9P2000 protocol requires the authentication and permission checks to be
done in the file server. For that reason every user that accesses the file
server tree has to authenticate and attach to the server separately.
Multiple users can share the same connection to the server.Currently v9fs does a single attach and executes all I/O operations as a
single user. This makes using v9fs in multiuser environment unsafe as it
depends on the client doing the permission checking.This patch improves the 9P2000 support by allowing every user to attach
separately. The patch defines three modes of access (new mount option
'access'):- attach-per-user (access=user) (default mode for 9P2000.u)
If a user tries to access a file served by v9fs for the first time, v9fs
sends an attach command to the server (Tattach) specifying the user. If
the attach succeeds, the user can access the v9fs tree.
As there is no uname->uid (string->integer) mapping yet, this mode works
only with the 9P2000.u dialect.- allow only one user to access the tree (access=)
Only the user with uid can access the v9fs tree. Other users that attempt
to access it will get EPERM error.- do all operations as a single user (access=any) (default for 9P2000)
V9fs does a single attach and all operations are done as a single user.
If this mode is selected, the v9fs behavior is identical with the current
one.Signed-off-by: Latchesar Ionkov
Signed-off-by: Eric Van Hensbergen -
Change the names of 'uid' and 'gid' parameters to the more appropriate
'dfltuid' and 'dfltgid'. This also sets the default uid/gid to -2
(aka nfsnobody)Signed-off-by: Latchesar Ionkov
Signed-off-by: Eric Van Hensbergen -
Create more general flags field in the v9fs_session_info struct and move the
'extended' flag as a bit in the flags.Signed-off-by: Latchesar Ionkov
Signed-off-by: Eric Van Hensbergen -
This patch abstracts out the interfaces to underlying transports so that
new transports can be added as modules. This should also allow kernel
configuration of transports without ifdef-hell.Signed-off-by: Eric Van Hensbergen
15 Jul, 2007
1 commit
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This patchset moves non-filesystem interfaces of v9fs from fs/9p to net/9p.
It moves the transport, packet marshalling and connection layers to net/9p
leaving only the VFS related files in fs/9p. This work is being done in
preparation for in-kernel 9p servers as well as alternate 9p clients (other
than VFS).Signed-off-by: Latchesar Ionkov
Signed-off-by: Eric Van Hensbergen
19 Feb, 2007
1 commit
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While cacheing is generally frowned upon in the 9p world, it has its
place -- particularly in situations where the remote file system is
exclusive and/or read-only. The vacfs views of venti content addressable
store are a real-world instance of such a situation. To facilitate higher
performance for these workloads (and eventually use the fscache patches),
we have enabled a "loose" cache mode which does not attempt to maintain
any form of consistency on the page-cache or dcache. This results in over
two orders of magnitude performance improvement for cacheable block reads
in the Bonnie benchmark. The more aggressive use of the dcache also seems
to improve metadata operational performance.Signed-off-by: Eric Van Hensbergen
26 Mar, 2006
2 commits
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Update license boilerplate to specify GPLv2 and remove the (at your option
clause). This change was agreed to by all the copyright holders (approvals
can be found on v9fs-developer mailing list).Signed-off-by: Eric Van Hensbergen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The code talks about these things called tids, which I eventually figured
out are tags.Signed-off-by: Eric Van Hensbergen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 Jan, 2006
1 commit
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New multiplexer implementation. Decreases the number of kernel threads
required. Better handling when the user process receives a signal.Signed-off-by: Latchesar Ionkov
Cc: Eric Van Hensbergen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
10 Sep, 2005
2 commits
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Support for force umount
Signed-off-by: Latchesar Ionkov
Signed-off-by: Eric Van Hensbergen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This part of the patch contains VFS superblock and mapping code.
Signed-off-by: Eric Van Hensbergen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds