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* fs/9p: Don't use dotl version of mknod for dotu inode operationsAneesh Kumar K.V2010-09-131-1/+1
| | | | | | | We should not use dotlversion for the dotu inode operations Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* fs/9p: Use the correct dentry operationsAneesh Kumar K.V2010-09-131-1/+4
| | | | | | | We should use the cached dentry operation only if caching mode is enabled Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* 9p: Check for NULL fid in v9fs_dir_release()jvrao2010-09-131-2/+4
| | | | | | | | NULL fid should be handled in cases where we endup calling v9fs_dir_release() before even we instantiate the fid in filp. Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* fs/9p: Fix error handling in v9fs_get_sbAneesh Kumar K.V2010-09-131-6/+14
| | | | | | | This was introduced by 7cadb63d58a932041afa3f957d5cbb6ce69dcee5 Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* fs/9p, net/9p: memory leak fixesLatchesar Ionkov2010-09-131-0/+2
| | | | | | | Four memory leak fixes in the 9P code. Signed-off-by: Latchesar Ionkov <lucho@ionkov.net> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* 9p: potential ERR_PTR() dereferenceDan Carpenter2010-08-301-1/+2
| | | | | | | | p9_client_walk() can return error values if we run out of space or there is a problem with the network. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* v9fs: fixup for inode_setattr being removedStephen Rothwell2010-08-111-3/+12
| | | | | Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Merge branch 'for-linus' of ↵Linus Torvalds2010-08-103-7/+18
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (96 commits) no need for list_for_each_entry_safe()/resetting with superblock list Fix sget() race with failing mount vfs: don't hold s_umount over close_bdev_exclusive() call sysv: do not mark superblock dirty on remount sysv: do not mark superblock dirty on mount btrfs: remove junk sb_dirt change BFS: clean up the superblock usage AFFS: wait for sb synchronization when needed AFFS: clean up dirty flag usage cifs: truncate fallout mbcache: fix shrinker function return value mbcache: Remove unused features add f_flags to struct statfs(64) pass a struct path to vfs_statfs update VFS documentation for method changes. All filesystems that need invalidate_inode_buffers() are doing that explicitly convert remaining ->clear_inode() to ->evict_inode() Make ->drop_inode() just return whether inode needs to be dropped fs/inode.c:clear_inode() is gone fs/inode.c:evict() doesn't care about delete vs. non-delete paths now ... Fix up trivial conflicts in fs/nilfs2/super.c
| * convert remaining ->clear_inode() to ->evict_inode()Al Viro2010-08-093-4/+6
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * remove inode_setattrChristoph Hellwig2010-08-091-3/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Replace inode_setattr with opencoded variants of it in all callers. This moves the remaining call to vmtruncate into the filesystem methods where it can be replaced with the proper truncate sequence. In a few cases it was obvious that we would never end up calling vmtruncate so it was left out in the opencoded variant: spufs: explicitly checks for ATTR_SIZE earlier btrfs,hugetlbfs,logfs,dlmfs: explicitly clears ATTR_SIZE earlier ufs: contains an opencoded simple_seattr + truncate that sets the filesize just above In addition to that ncpfs called inode_setattr with handcrafted iattrs, which allowed to trim down the opencoded variant. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | 9p: fix sparse warnings in new xattr codeEric Van Hensbergen2010-08-021-2/+2
| | | | | | | | | | | | | | | | | | | | fixes: CHECK fs/9p/xattr.c fs/9p/xattr.c:73:6: warning: Using plain integer as NULL pointer fs/9p/xattr.c:135:6: warning: Using plain integer as NULL pointer Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* | fs/9p: remove sparse warning in vfs_inodeEric Van Hensbergen2010-08-021-1/+1
| | | | | | | | | | | | make v9fs_dentry_from_dir_inode static Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* | fs/9p: Prevent parallel rename when doing fid_lookupAneesh Kumar K.V2010-08-025-39/+91
| | | | | | | | | | | | | | | | | | | | | | | | 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 <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* | fs/9p: Add support user. xattrAneesh Kumar K.V2010-08-026-3/+289
| | | | | | | | | | | | Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* | 9p: Implement LOPENM. Mohan Kumar2010-08-021-4/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Implement 9p2000.L version of open(LOPEN) interface in 9p client. For LOPEN, no need to convert the flags to and from 9p mode to VFS mode. Synopsis: size[4] Tlopen tag[2] fid[4] mode[4] size[4] Rlopen tag[2] qid[13] iounit[4] [Fix mode bit format - jvrao@linux.vnet.ibm.com] Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbegren <ericvh@gmail.com>
* | fs/9p: This patch implements TLCREATE for 9p2000.L protocol.Venkateswararao Jujjuri (JV)2010-08-021-1/+113
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | SYNOPSIS size[4] Tlcreate tag[2] fid[4] name[s] flags[4] mode[4] gid[4] size[4] Rlcreate tag[2] qid[13] iounit[4] DESCRIPTION The Tlreate request asks the file server to create a new regular file with the name supplied, in the directory (dir) represented by fid. The mode argument specifies the permissions to use. New file is created with the uid if the fid and with supplied gid. The flags argument represent Linux access mode flags with which the caller is requesting to open the file with. Protocol allows all the Linux access modes but it is upto the server to allow/disallow any of these acess modes. If the server doesn't support any of the access mode, it is expected to return error. Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* | 9p: Implement TMKDIRM. Mohan Kumar2010-08-021-3/+80
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Implement TMKDIR as part of 2000.L Work Synopsis size[4] Tmkdir tag[2] fid[4] name[s] mode[4] gid[4] size[4] Rmkdir tag[2] qid[13] Description mkdir asks the file server to create a directory with given name, mode and gid. The qid for the new directory is returned with the mkdir reply message. Note: 72 is selected as the opcode for TMKDIR from the reserved list. Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* | 9p: Implement TMKNODM. Mohan Kumar2010-08-021-3/+103
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Synopsis size[4] Tmknod tag[2] fid[4] name[s] mode[4] major[4] minor[4] gid[4] size[4] Rmknod tag[2] qid[13] Description mknod asks the file server to create a device node with given major and minor number, mode and gid. The qid for the new device node is returned with the mknod reply message. [sripathik@in.ibm.com: Fix error handling code] Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* | 9p: Define and implement TSYMLINK for 9P2000.LVenkateswararao Jujjuri (JV)2010-08-021-4/+97
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Create a symbolic link SYNOPSIS size[4] Tsymlink tag[2] fid[4] name[s] symtgt[s] gid[4] size[4] Rsymlink tag[2] qid[13] DESCRIPTION Create a symbolic link named 'name' pointing to 'symtgt'. gid represents the effective group id of the caller. The permissions of a symbolic link are irrelevant hence it is omitted from the protocol. Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Reviewed-by: Sripathi Kodi <sripathik@in.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* | 9p: Define and implement TLINK for 9P2000.LEric Van Hensbergen2010-08-021-1/+106
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds a helper function to get the dentry from inode and uses it in creating a Hardlink SYNOPSIS size[4] Tlink tag[2] dfid[4] oldfid[4] newpath[s] size[4] Rlink tag[2] DESCRIPTION Create a link 'newpath' in directory pointed by dfid linking to oldfid path. [sripathik@in.ibm.com : p9_client_link should not free req structure if p9_client_rpc has returned an error.] Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* | 9p: Implement client side of setattr for 9P2000.L protocol.Sripathi Kodi2010-08-021-3/+46
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | SYNOPSIS size[4] Tsetattr tag[2] attr[n] size[4] Rsetattr tag[2] DESCRIPTION The setattr command changes some of the file status information. attr resembles the iattr structure used in Linux kernel. It specifies which status parameter is to be changed and to what value. It is laid out as follows: valid[4] specifies which status information is to be changed. Possible values are: ATTR_MODE (1 << 0) ATTR_UID (1 << 1) ATTR_GID (1 << 2) ATTR_SIZE (1 << 3) ATTR_ATIME (1 << 4) ATTR_MTIME (1 << 5) ATTR_ATIME_SET (1 << 7) ATTR_MTIME_SET (1 << 8) The last two bits represent whether the time information is being sent by the client's user space. In the absense of these bits the server always uses server's time. mode[4] File permission bits uid[4] Owner id of file gid[4] Group id of the file size[8] File size atime_sec[8] Time of last file access, seconds atime_nsec[8] Time of last file access, nanoseconds mtime_sec[8] Time of last file modification, seconds mtime_nsec[8] Time of last file modification, nanoseconds Explanation of the patches: -------------------------- *) The kernel just copies relevent contents of iattr structure to p9_iattr_dotl structure and passes it down to the client. The only check it has is calling inode_change_ok() *) The p9_iattr_dotl structure does not have ctime and ia_file parameters because I don't think these are needed in our case. The client user space can request updating just ctime by calling chown(fd, -1, -1). This is handled on server side without a need for putting ctime on the wire. *) The server currently supports changing mode, time, ownership and size of the file. *) 9P RFC says "Either all the changes in wstat request happen, or none of them does: if the request succeeds, all changes were made; if it fails, none were." I have not done anything to implement this specifically because I don't see a reason. Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* | 9p: getattr client implementation for 9P2000.L protocol.Sripathi Kodi2010-08-023-34/+187
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | SYNOPSIS size[4] Tgetattr tag[2] fid[4] request_mask[8] size[4] Rgetattr tag[2] lstat[n] DESCRIPTION The getattr transaction inquires about the file identified by fid. request_mask is a bit mask that specifies which fields of the stat structure is the client interested in. The reply will contain a machine-independent directory entry, laid out as follows: st_result_mask[8] Bit mask that indicates which fields in the stat structure have been populated by the server qid.type[1] the type of the file (directory, etc.), represented as a bit vector corresponding to the high 8 bits of the file's mode word. qid.vers[4] version number for given path qid.path[8] the file server's unique identification for the file st_mode[4] Permission and flags st_uid[4] User id of owner st_gid[4] Group ID of owner st_nlink[8] Number of hard links st_rdev[8] Device ID (if special file) st_size[8] Size, in bytes st_blksize[8] Block size for file system IO st_blocks[8] Number of file system blocks allocated st_atime_sec[8] Time of last access, seconds st_atime_nsec[8] Time of last access, nanoseconds st_mtime_sec[8] Time of last modification, seconds st_mtime_nsec[8] Time of last modification, nanoseconds st_ctime_sec[8] Time of last status change, seconds st_ctime_nsec[8] Time of last status change, nanoseconds st_btime_sec[8] Time of creation (birth) of file, seconds st_btime_nsec[8] Time of creation (birth) of file, nanoseconds st_gen[8] Inode generation st_data_version[8] Data version number request_mask and result_mask bit masks contain the following bits #define P9_STATS_MODE 0x00000001ULL #define P9_STATS_NLINK 0x00000002ULL #define P9_STATS_UID 0x00000004ULL #define P9_STATS_GID 0x00000008ULL #define P9_STATS_RDEV 0x00000010ULL #define P9_STATS_ATIME 0x00000020ULL #define P9_STATS_MTIME 0x00000040ULL #define P9_STATS_CTIME 0x00000080ULL #define P9_STATS_INO 0x00000100ULL #define P9_STATS_SIZE 0x00000200ULL #define P9_STATS_BLOCKS 0x00000400ULL #define P9_STATS_BTIME 0x00000800ULL #define P9_STATS_GEN 0x00001000ULL #define P9_STATS_DATA_VERSION 0x00002000ULL #define P9_STATS_BASIC 0x000007ffULL #define P9_STATS_ALL 0x00003fffULL This patch implements the client side of getattr implementation for 9P2000.L. It introduces a new structure p9_stat_dotl for getting Linux stat information along with QID. The data layout is similar to stat structure in Linux user space with the following major differences: inode (st_ino) is not part of data. Instead qid is. device (st_dev) is not part of data because this doesn't make sense on the client. All time variables are 64 bit wide on the wire. The kernel seems to use 32 bit variables for these variables. However, some of the architectures have used 64 bit variables and glibc exposes 64 bit variables to user space on some architectures. Hence to be on the safer side we have made these 64 bit in the protocol. Refer to the comments in include/asm-generic/stat.h There are some additional fields: st_btime_sec, st_btime_nsec, st_gen, st_data_version apart from the bitmask, st_result_mask. The bit mask is filled by the server to indicate which stat fields have been populated by the server. Currently there is no clean way for the server to obtain these additional fields, so it sends back just the basic fields. Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com> Signed-off-by: Eric Van Hensbegren <ericvh@gmail.com>
* | fs/9p: Pass the correct user credentials during attachAneesh Kumar K.V2010-08-022-2/+3
| | | | | | | | | | | | | | | | | | We need to make sure we pass the right uid value during attach. dotl is similar to dotu in this regard. Without this mapped security model on dotl doesn't work Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* | 9p: readdir implementation for 9p2000.LSripathi Kodi2010-08-021-16/+118
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch implements the kernel part of readdir() implementation for 9p2000.L Change from V3: Instead of inode, server now sends qids for each dirent SYNOPSIS size[4] Treaddir tag[2] fid[4] offset[8] count[4] size[4] Rreaddir tag[2] count[4] data[count] DESCRIPTION The readdir request asks the server to read the directory specified by 'fid' at an offset specified by 'offset' and return as many dirent structures as possible that fit into count bytes. Each dirent structure is laid out as follows. qid.type[1] the type of the file (directory, etc.), represented as a bit vector corresponding to the high 8 bits of the file's mode word. qid.vers[4] version number for given path qid.path[8] the file server's unique identification for the file offset[8] offset into the next dirent. type[1] type of this directory entry. name[256] name of this directory entry. This patch adds v9fs_dir_readdir_dotl() as the readdir() call for 9p2000.L. This function sends P9_TREADDIR command to the server. In response the server sends a buffer filled with dirent structures. This is different from the existing v9fs_dir_readdir() call which receives stat structures from the server. This results in significant speedup of readdir() on large directories. For example, doing 'ls >/dev/null' on a directory with 10000 files on my laptop takes 1.088 seconds with the existing code, but only takes 0.339 seconds with the new readdir. Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* | 9p: Make use of iounit for read/writeM. Mohan Kumar2010-08-021-6/+7
|/ | | | | | | | | | | Change the v9fs_file_readn function to limit the maximum transfer size based on the iounit or msize. Also remove the redundant check for limiting the transfer size in v9fs_file_write. This check is done by p9_client_write. Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* 9p: Pass the correct end of buffer to p9stat_readLatchesar Ionkov2010-07-271-1/+1
| | | | | | | Pass the correct end of the buffer to p9stat_read. Signed-off-by: Latchesar Ionkov <lucho@ionkov.net> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* drop unused dentry argument to ->fsyncChristoph Hellwig2010-05-271-4/+2
| | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Merge branch 'for-linus' of ↵Linus Torvalds2010-05-245-30/+153
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs: 9p: Optimize TCREATE by eliminating a redundant fid clone. 9p: cleanup: remove unneeded assignment 9p: Add mksock support fs/9p: Make sure we properly instantiate dentry. 9p: add 9P2000.L rename operation 9p: add 9P2000.L statfs operation 9p: VFS switches for 9p2000.L: VFS switches 9p: VFS switches for 9p2000.L: protocol and client changes
| * 9p: Optimize TCREATE by eliminating a redundant fid clone.Venkateswararao Jujjuri2010-05-221-12/+6
| | | | | | | | | | | | | | | | This patch removes a redundant fid clone on the directory fid and hence reduces a server transaction while creating new filesystem object. Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * 9p: cleanup: remove unneeded assignmentDan Carpenter2010-05-221-2/+0
| | | | | | | | | | | | | | We never use "v9ses" and so we can remove it. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * 9p: Add mksock supportVenkateswararao Jujjuri2010-05-221-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Without this patch, an attempt to mksock will get an EINVAL. Before this patch: [root@localhost 1dir]# mksock mysock mksock: error making mysock: Invalid argument With this patch: [root@localhost 1dir]# mksock mysock [root@localhost 1dir]# ls -l mysock s--------- 1 root root 0 2010-03-31 17:44 mysock Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * fs/9p: Make sure we properly instantiate dentry.Aneesh Kumar K.V2010-05-221-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For lookup if we get ENOENT error from the server we still instantiate the dentry. We need to make sure we have dentry operations set in that case so that a later dput on the dentry does the expected. Without the patch we get the below error #ln -sf abc abclink ln: creating symbolic link `abclink': No such file or directory Now on the host do $ touch abclink Guest now gives ENOENT error. # ls ls: cannot access abclink: No such file or directory Debugged-by:Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * 9p: add 9P2000.L rename operationSripathi Kodi2010-05-211-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I made a V2 of this patch on top of my patches for VFS switches. All the changes were due to change in some offsets. rename - change name of file or directory size[4] Trename tag[2] fid[4] newdirfid[4] name[s] size[4] Rrename tag[2] The rename message is used to change the name of a file, possibly moving it to a new directory. The 9P wstat message can only rename a file within the same directory. Signed-off-by: Jim Garlick <garlick@llnl.gov> Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * 9p: add 9P2000.L statfs operationSripathi Kodi2010-05-211-1/+38
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I made a V2 of this patch on top of my patches for VFS switches. The change was adding v9fs_statfs pointer to v9fs_super_ops_dotl instead of v9fs_super_ops. statfs - get file system statistics size[4] Tstatfs tag[2] fid[4] size[4] Rstatfs tag[2] type[4] bsize[4] blocks[8] bfree[8] bavail[8] files[8] ffree[8] fsid[8] namelen[4] The statfs message is used to request file system information returned by the statfs(2) system call, which is used by df(1) to report file system and disk space usage. Signed-off-by: Jim Garlick <garlick@llnl.gov> Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * 9p: VFS switches for 9p2000.L: VFS switchesSripathi Kodi2010-05-215-13/+97
| | | | | | | | | | | | | | Implements VFS switches for 9p2000.L protocol. Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* | 9p: replace inode uid,gid,mode initialization with helper functionDmitry Monakhov2010-05-211-3/+1
|/ | | | | Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* 9p: add bdi backing to mount sessionJens Axboe2010-04-223-0/+13
| | | | | | This ensures that dirty data gets flushed properly. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* Merge branch 'for-linus' of ↵Linus Torvalds2010-04-056-7/+41
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs: 9p: saving negative to unsigned char 9p: return on mutex_lock_interruptible() 9p: Creating files with names too long should fail with ENAMETOOLONG. 9p: Make sure we are able to clunk the cached fid on umount 9p: drop nlink remove fs/9p: Clunk the fid resulting from partial walk of the name 9p: documentation update 9p: Fix setting of protocol flags in v9fs_session_info structure.
| * 9p: return on mutex_lock_interruptible()Dan Carpenter2010-04-051-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If "err" is -EINTR here the original code calls mutex_unlock() and then returns, but it should just return directly. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com> ------------------------------------------------------------------------------ Download Intel&#174; Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev
| * 9p: Creating files with names too long should fail with ENAMETOOLONG.Sripathi Kodi2010-04-051-0/+3
| | | | | | | | | | | | | | Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * 9p: Make sure we are able to clunk the cached fid on umountAneesh Kumar K.V2010-04-053-1/+16
| | | | | | | | | | | | | | | | | | | | dcache prune happen on umount. So we cannot mark the client satus disconnect. That will prevent a 9p call to the server Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * 9p: drop nlink removeAneesh Kumar K.V2010-04-051-1/+5
| | | | | | | | | | | | | | | | | | We need to drop the link count on the inode of a sucessfull remove Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * fs/9p: Clunk the fid resulting from partial walk of the nameAneesh Kumar K.V2010-04-051-2/+10
| | | | | | | | | | Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| * 9p: Fix setting of protocol flags in v9fs_session_info structure.Sripathi Kodi2010-04-051-3/+5
| | | | | | | | | | | | | | | | | | | | | | This patch fixes a simple bug I left behind in my earlier protocol negotiation patch. Thanks, Sripathi. Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* | include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo2010-03-307-0/+7
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
* 9p: Skip check for mandatory locks when unlockingSachin Prabhu2010-03-131-1/+1
| | | | | | | | | | | | | | | | | | While investigating a bug, I came across a possible bug in v9fs. The problem is similar to the one reported for NFS by ASANO Masahiro in http://lkml.org/lkml/2005/12/21/334. v9fs_file_lock() will skip locks on file which has mode set to 02666. This is a problem in cases where the mode of the file is changed after a process has obtained a lock on the file. Such a lock will be skipped during unlock and the machine will end up with a BUG in locks_remove_flock(). v9fs_file_lock() should skip the check for mandatory locks when unlocking a file. Signed-off-by: Sachin Prabhu <sprabhu@redhat.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* 9p: Fixes a simple bug enabling writes beyond 2GB.jvrao2010-03-131-1/+1
| | | | | | | | Fixes a simple bug so that large files beyond 2GB can be created. Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* 9p: Change the name of new protocol from 9p2010.L to 9p2000.LSripathi Kodi2010-03-131-3/+3
| | | | | | | | | 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 <sripathik@in.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* fs/9p: re-init the wstat in readdir loopAneesh Kumar K.V2010-03-131-1/+10
| | | | | | | | | This ensure that on failure when we free the stat buf we don't end up freeing an already freed pointer in the earlier loop Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
* fs/9p: Add hardlink support to .u extensionAneesh Kumar K.V2010-03-051-1/+18
| | | | | | | | For regular file and directories we put the link count in th extension field in a tagged string format. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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