1. 04 Aug, 2010 12 commits
  2. 03 Aug, 2010 9 commits
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw · 3a09b1be
      Linus Torvalds authored
      * git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw:
        GFS2: Fix recovery stuck bug (try #2)
        GFS2: Fix typo in stuffed file data copy handling
        Revert "GFS2: recovery stuck on transaction lock"
        GFS2: Make "try" lock not try quite so hard
        GFS2: remove dependency on __GFP_NOFAIL
        GFS2: Simplify gfs2_write_alloc_required
        GFS2: Wait for journal id on mount if not specified on mount command line
        GFS2: Use nobh_writepage
      3a09b1be
    • Linus Torvalds's avatar
      Merge branch 'linux-next' of git://git.infradead.org/ubi-2.6 · 7046e668
      Linus Torvalds authored
      * 'linux-next' of git://git.infradead.org/ubi-2.6:
        UBI: do not warn unnecessarily
        UBI: do not print message about corruptes PEBs if we have none of them
        UBI: improve delete-compatible volumes handling
        UBI: fix error message and compilation warnings
        UBI: generate random image_seq when formatting MTD devices
        UBI: improve ECC error message
        UBI: improve corrupted flash handling
        UBI: introduce eraseblock counter variables
        UBI: introduce a new IO return code
        UBI: simplify IO error codes
      7046e668
    • Linus Torvalds's avatar
      Merge branch 'linux-next' of git://git.infradead.org/ubifs-2.6 · c939f9f9
      Linus Torvalds authored
      * 'linux-next' of git://git.infradead.org/ubifs-2.6:
        UBIFS: fix a memory leak on error path.
        UBIFS: fix GC LEB recovery
        UBIFS: use ERR_CAST
        UBIFS: check return code
      c939f9f9
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs · b8b3e905
      Linus Torvalds authored
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs: (22 commits)
        9p: fix sparse warnings in new xattr code
        fs/9p: remove sparse warning in vfs_inode
        fs/9p: destroy fid on failed remove
        fs/9p: Prevent parallel rename when doing fid_lookup
        fs/9p: Add support user. xattr
        net/9p: Implement TXATTRCREATE 9p call
        net/9p: Implement attrwalk 9p call
        9p: Implement LOPEN
        fs/9p: This patch implements TLCREATE for 9p2000.L protocol.
        9p: Implement TMKDIR
        9p: Implement TMKNOD
        9p: Define and implement TSYMLINK for 9P2000.L
        9p: Define and implement TLINK for 9P2000.L
        9p: Define and implement TLINK for 9P2000.L
        9p: Implement client side of setattr for 9P2000.L protocol.
        9p: getattr client implementation for 9P2000.L protocol.
        fs/9p: Pass the correct user credentials during attach
        net/9p: Handle the server returned error properly
        9p: readdir implementation for 9p2000.L
        9p: Make use of iounit for read/write
        ...
      b8b3e905
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs · 51102ee5
      Linus Torvalds authored
      * 'for-linus' of git://oss.sgi.com/xfs/xfs: (49 commits)
        xfs simplify and speed up direct I/O completions
        xfs: move aio completion after unwritten extent conversion
        direct-io: move aio_complete into ->end_io
        xfs: fix big endian build
        xfs: clean up xfs_bmap_get_bp
        xfs: simplify xfs_truncate_file
        xfs: kill the b_strat callback in xfs_buf
        xfs: remove obsolete osyncisosync mount option
        xfs: clean up filestreams helpers
        xfs: fix gcc 4.6 set but not read and unused statement warnings
        xfs: Fix build when CONFIG_XFS_POSIX_ACL=n
        xfs: fix unsigned underflow in xfs_free_eofblocks
        xfs: use GFP_NOFS for page cache allocation
        xfs: fix memory reclaim recursion deadlock on locked inode buffer
        xfs: fix xfs_trans_add_item() lockdep warnings
        xfs: simplify and remove xfs_ireclaim
        xfs: don't block on buffer read errors
        xfs: move inode shrinker unregister even earlier
        xfs: remove a dmapi leftover
        xfs: writepage always has buffers
        ...
      51102ee5
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6 · 54161df1
      Linus Torvalds authored
      * git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6: (29 commits)
        cifs: fsc should not default to "on"
        [CIFS] remove redundant path walking in dfs_do_refmount
        cifs: ignore the "mand", "nomand" and "_netdev" mount options
        cifs: map NT_STATUS_ERROR_WRITE_PROTECTED to -EROFS
        cifs: don't allow cifs_iget to match inodes of the wrong type
        [CIFS] relinquish fscache cookie before freeing CIFSTconInfo
        cifs: add separate cred_uid field to sesInfo
        fs: cifs: check kmalloc() result
        [CIFS] Missing ifdef
        [CIFS] Missing line from previous commit
        [CIFS] Fix build break when CONFIG_CIFS_FSCACHE disabled
        cifs: add mount option to enable local caching
        cifs: read pages from FS-Cache
        cifs: store pages into local cache
        cifs: FS-Cache page management
        cifs: define inode-level cache object and register them
        cifs: define superblock-level cache index objects and register them
        cifs: remove unused cifsUidInfo struct
        cifs: clean up cifs_find_smb_ses (try #2)
        cifs: match secType when searching for existing tcp session
        ...
      54161df1
    • Linus Torvalds's avatar
      Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm · be82ae02
      Linus Torvalds authored
      * 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (291 commits)
        ARM: AMBA: Add pclk support to AMBA bus infrastructure
        ARM: 6278/2: fix regression in RealView after the introduction of pclk
        ARM: 6277/1: mach-shmobile: Allow users to select HZ, default to 128
        ARM: 6276/1: mach-shmobile: remove duplicate NR_IRQS_LEGACY
        ARM: 6246/1: mmci: support larger MMCIDATALENGTH register
        ARM: 6245/1: mmci: enable hardware flow control on Ux500 variants
        ARM: 6244/1: mmci: add variant data and default MCICLOCK support
        ARM: 6243/1: mmci: pass power_mode to the translate_vdd callback
        ARM: 6274/1: add global control registers definition header file for nuc900
        mx2_camera: fix type of dma buffer virtual address pointer
        mx2_camera: Add soc_camera support for i.MX25/i.MX27
        arm/imx/gpio: add spinlock protection
        ARM: Add support for the LPC32XX arch
        ARM: LPC32XX: Arch config menu supoport and makefiles
        ARM: LPC32XX: Phytec 3250 platform support
        ARM: LPC32XX: Misc support functions
        ARM: LPC32XX: Serial support code
        ARM: LPC32XX: System suspend support
        ARM: LPC32XX: GPIO, timer, and IRQ drivers
        ARM: LPC32XX: Clock driver
        ...
      be82ae02
    • Helge Deller's avatar
      PARISC: led.c - fix potential stack overflow in led_proc_write() · 4b4fd27c
      Helge Deller authored
      avoid potential stack overflow by correctly checking count parameter
      Reported-by: default avatarIlja <ilja@netric.org>
      Signed-off-by: default avatarHelge Deller <deller@gmx.de>
      Acked-by: default avatarKyle McMartin <kyle@mcmartin.ca>
      Cc: James E.J. Bottomley <jejb@parisc-linux.org>
      Cc: stable@kernel.org
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      4b4fd27c
    • Matthieu CASTET's avatar
      UBIFS: fix a memory leak on error path. · c18de72f
      Matthieu CASTET authored
      In 'mount_ubifs()', in case of 'ubifs_leb_unmap()' falure,
      free allocated resources.
      Signed-off-by: default avatarMatthieu CASTET <matthieu.castet@parrot.com>
      Signed-off-by: default avatarArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
      c18de72f
  3. 02 Aug, 2010 19 commits
    • Eric Van Hensbergen's avatar
      9p: fix sparse warnings in new xattr code · 327aec03
      Eric Van Hensbergen authored
      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: default avatarEric Van Hensbergen <ericvh@gmail.com>
      327aec03
    • Eric Van Hensbergen's avatar
      fs/9p: remove sparse warning in vfs_inode · ea137533
      Eric Van Hensbergen authored
      make v9fs_dentry_from_dir_inode static
      Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
      ea137533
    • Aneesh Kumar K.V's avatar
      fs/9p: destroy fid on failed remove · 0b1208b1
      Aneesh Kumar K.V authored
      9P spec says:
      "It is correct to consider remove to be a clunk with the
      side effect of removing the file if permissions allow. "
      
      So even if remove fails we need to destroy the fid.
      
      Without this patch an rmdir on a directory with contents leave
      the new cloned directory fid fid attached to fidlist. On umount
      we dump the fids on the fidlist
      
      ~# rmdir /mnt2/test4/
      rmdir: failed to remove `/mnt2/test4/': Directory not empty
      ~# umount /mnt2/
      ~# dmesg
      [  228.474323] Found fid 3 not clunked
      Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
      Signed-off-by: default avatarVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
      Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
      0b1208b1
    • Aneesh Kumar K.V's avatar
      fs/9p: Prevent parallel rename when doing fid_lookup · a534c8d1
      Aneesh Kumar K.V authored
      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: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
      Signed-off-by: default avatarVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
      Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
      a534c8d1
    • Aneesh Kumar K.V's avatar
    • Aneesh Kumar K.V's avatar
      net/9p: Implement TXATTRCREATE 9p call · eda25e46
      Aneesh Kumar K.V authored
      TXATTRCREATE:  Prepare a fid for setting xattr value on a file system object.
      
       size[4] TXATTRCREATE tag[2] fid[4] name[s] attr_size[8] flags[4]
       size[4] RXATTRCREATE tag[2]
      
      txattrcreate gets a fid pointing to xattr. This fid can later be
      used to set the xattr value.
      
      flag value is derived from set Linux setxattr. The manpage says
      "The flags parameter can be used to refine the semantics of the operation.
      XATTR_CREATE specifies a pure create, which fails if the named attribute
      exists already. XATTR_REPLACE specifies a pure replace operation, which
      fails if the named attribute does not already exist. By default (no flags),
      the extended attribute will be created if need be, or will simply replace
      the value if the attribute exists."
      
      The actual setxattr operation happens when the fid is clunked. At that point
      the written byte count and the attr_size specified in TXATTRCREATE should be
      same otherwise an error will be returned.
      Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
      Signed-off-by: default avatarVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
      Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
      eda25e46
    • Aneesh Kumar K.V's avatar
      net/9p: Implement attrwalk 9p call · 0ef63f34
      Aneesh Kumar K.V authored
      TXATTRWALK: Descend a ATTR namespace
      
       size[4] TXATTRWALK tag[2] fid[4] newfid[4] name[s]
       size[4] RXATTRWALK tag[2] size[8]
      
      txattrwalk gets a fid pointing to xattr. This fid can later be
      used to read the xattr value. If name is NULL the fid returned
      can be used to get the list of extended attribute associated to
      the file system object.
      Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
      Signed-off-by: default avatarVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
      Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
      0ef63f34
    • M. Mohan Kumar's avatar
      9p: Implement LOPEN · ef56547e
      M. Mohan Kumar authored
      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: default avatarM. Mohan Kumar <mohan@in.ibm.com>
      Signed-off-by: default avatarVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
      Signed-off-by: default avatarEric Van Hensbegren <ericvh@gmail.com>
      ef56547e
    • Venkateswararao Jujjuri (JV)'s avatar
      fs/9p: This patch implements TLCREATE for 9p2000.L protocol. · 5643135a
      Venkateswararao Jujjuri (JV) authored
      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: default avatarVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
      Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
      5643135a
    • M. Mohan Kumar's avatar
      9p: Implement TMKDIR · 01a622bd
      M. Mohan Kumar authored
      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: default avatarM. Mohan Kumar <mohan@in.ibm.com>
      Signed-off-by: default avatarVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
      Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
      01a622bd
    • M. Mohan Kumar's avatar
      9p: Implement TMKNOD · 4b43516a
      M. Mohan Kumar authored
      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: default avatarM. Mohan Kumar <mohan@in.ibm.com>
      Signed-off-by: default avatarVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
      Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
      4b43516a
    • Venkateswararao Jujjuri (JV)'s avatar
      9p: Define and implement TSYMLINK for 9P2000.L · 50cc42ff
      Venkateswararao Jujjuri (JV) authored
      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: default avatarVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
      Reviewed-by: default avatarSripathi Kodi <sripathik@in.ibm.com>
      Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
      50cc42ff
    • Venkateswararao Jujjuri (JV)'s avatar
      9p: Define and implement TLINK for 9P2000.L · 652df9a7
      Venkateswararao Jujjuri (JV) authored
      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: default avatarVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
      Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
      652df9a7
    • Eric Van Hensbergen's avatar
      9p: Define and implement TLINK for 9P2000.L · 09d34ee5
      Eric Van Hensbergen authored
      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: default avatarVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
      Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
      09d34ee5
    • Sripathi Kodi's avatar
      9p: Implement client side of setattr for 9P2000.L protocol. · 87d7845a
      Sripathi Kodi authored
          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: default avatarSripathi Kodi <sripathik@in.ibm.com>
      Signed-off-by: default avatarVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
      Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
      87d7845a
    • Sripathi Kodi's avatar
      9p: getattr client implementation for 9P2000.L protocol. · f0853122
      Sripathi Kodi authored
              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: default avatarSripathi Kodi <sripathik@in.ibm.com>
      Signed-off-by: default avatarEric Van Hensbegren <ericvh@gmail.com>
      f0853122
    • Aneesh Kumar K.V's avatar
      fs/9p: Pass the correct user credentials during attach · 9ffaf63e
      Aneesh Kumar K.V authored
      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: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
      Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
      9ffaf63e
    • Aneesh Kumar K.V's avatar
      net/9p: Handle the server returned error properly · 69d4b443
      Aneesh Kumar K.V authored
      We need to get the negative errno value in the kernel
      even for dotl.
      Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
      Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
      69d4b443
    • Sripathi Kodi's avatar
      9p: readdir implementation for 9p2000.L · 7751bdb3
      Sripathi Kodi authored
      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: default avatarSripathi Kodi <sripathik@in.ibm.com>
      Reviewed-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
      Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
      7751bdb3