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2010-10-31Merge branches 'irq-core-for-linus' and 'core-locking-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: genirq: Fix up irq_node() for irq_data changes. genirq: Add single IRQ reservation helper genirq: Warn if enable_irq is called before irq is set up * 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: semaphore: Remove mutex emulation staging: Final semaphore cleanup jbd2: Convert jbd2_slab_create_sem to mutex hpfs: Convert sbi->hpfs_creation_de to mutex Fix up trivial change/delete conflicts with deleted 'dream' drivers (drivers/staging/dream/camera/{mt9d112.c,mt9p012_fox.c,mt9t013.c,s5k3e2fx.c})
2010-10-31locks: remove fl_copy_lock lock_manager operationChristoph Hellwig
This one was only used for a nasty hack in nfsd, which has recently been removed. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-31locks: let the caller free file_lock on ->setlease failureChristoph Hellwig
The caller allocated it, the caller should free it. The only issue so far is that we could change the flp pointer even on an error return if the fl_change callback failed. But we can simply move the flp assignment after the fl_change invocation, as the callers don't care about the flp return value if the setlease call failed. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-30nfsd4: initialize delegation pointer to leaseJ. Bruce Fields
The NFSv4 server was initializing the dp->dl_flock pointer by the somewhat ridiculous method of a locks_copy_lock callback. Now that setlease uses the passed-in lock instead of doing a copy, dl_flock no longer gets set, resulting in the lock leaking on delegation release, and later possible hangs (among other problems). So, initialize dl_flock and get rid of the callback. Signed-off-by: J. Bruce Fields <bfields@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-30locks: fix setlease methods to free passed-in lockJ. Bruce Fields
We modified setlease to require the caller to allocate the new lease in the case of creating a new lease, but forgot to fix up the filesystem methods. Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Steve French <sfrench@samba.org> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-30locks: fix leaks on setlease errorsJ. Bruce Fields
We're depending on setlease to free the passed-in lease on failure. Signed-off-by: J. Bruce Fields <bfields@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-30locks: prevent ENOMEM on lease unlockJ. Bruce Fields
Removing a lock shouldn't require any allocations; a failure due to ENOMEM leaves the caller with a choice between retrying or giving up and leaking an unused lease. Next we should split the other lease calls into add and delete cases. I wanted to start with just the bugfix. Signed-off-by: J. Bruce Fields <bfields@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-30Merge branch 'for-linus' of git://git.infradead.org/users/eparis/notifyLinus Torvalds
* 'for-linus' of git://git.infradead.org/users/eparis/notify: (22 commits) Ensure FMODE_NONOTIFY is not set by userspace make fanotify_read() restartable across signals fsnotify: remove alignment padding from fsnotify_mark on 64 bit builds fs/notify/fanotify/fanotify_user.c: fix warnings fanotify: Fix FAN_CLOSE comments fanotify: do not recalculate the mask if the ignored mask changed fanotify: ignore events on directories unless specifically requested fsnotify: rename FS_IN_ISDIR to FS_ISDIR fanotify: do not send events for irregular files fanotify: limit number of listeners per user fanotify: allow userspace to override max marks fanotify: limit the number of marks in a single fanotify group fanotify: allow userspace to override max queue depth fsnotify: implement a default maximum queue depth fanotify: ignore fanotify ignore marks if open writers fanotify: allow userspace to flush all marks fsnotify: call fsnotify_parent in perm events fsnotify: correctly handle return codes from listeners fanotify: use __aligned_u64 in fanotify userspace metadata fanotify: implement fanotify listener ordering ...
2010-10-30make fanotify_read() restartable across signalsLino Sanfilippo
In fanotify_read() return -ERESTARTSYS instead of -EINTR to make read() restartable across signals (BSD semantic). Signed-off-by: Eric Paris <eparis@redhat.com>
2010-10-30Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: (39 commits) Btrfs: deal with errors from updating the tree log Btrfs: allow subvol deletion by unprivileged user with -o user_subvol_rm_allowed Btrfs: make SNAP_DESTROY async Btrfs: add SNAP_CREATE_ASYNC ioctl Btrfs: add START_SYNC, WAIT_SYNC ioctls Btrfs: async transaction commit Btrfs: fix deadlock in btrfs_commit_transaction Btrfs: fix lockdep warning on clone ioctl Btrfs: fix clone ioctl where range is adjacent to extent Btrfs: fix delalloc checks in clone ioctl Btrfs: drop unused variable in block_alloc_rsv Btrfs: cleanup warnings from gcc 4.6 (nonbugs) Btrfs: Fix variables set but not read (bugs found by gcc 4.6) Btrfs: Use ERR_CAST helpers Btrfs: use memdup_user helpers Btrfs: fix raid code for removing missing drives Btrfs: Switch the extent buffer rbtree into a radix tree Btrfs: restructure try_release_extent_buffer() Btrfs: use the flusher threads for delalloc throttling Btrfs: tune the chunk allocation to 5% of the FS as metadata ... Fix up trivial conflicts in fs/btrfs/super.c and fs/fs-writeback.c, and remove use of INIT_RCU_HEAD in fs/btrfs/extent_io.c (that init macro was useless and removed in commit 5e8067adfdba: "rcu head remove init")
2010-10-30fs-writeback.c: unify some common codeLinus Torvalds
The btrfs merge looks like hell, because it changes fs-writeback.c, and the crazy code has this repeated "estimate number of dirty pages" counting that involves three different helper functions. And it's done in two different places. Just unify that whole calculation as a "get_nr_dirty_pages()" helper function, and the merge result will look half-way decent. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-30Merge git://git.infradead.org/mtd-2.6Linus Torvalds
* git://git.infradead.org/mtd-2.6: (82 commits) mtd: fix build error in m25p80.c mtd: Remove redundant mutex from mtd_blkdevs.c MTD: Fix wrong check register_blkdev return value Revert "mtd: cleanup Kconfig dependencies" mtd: cfi_cmdset_0002: make sector erase command variable mtd: cfi_cmdset_0002: add CFI detection for SST 38VF640x chips mtd: cfi_util: add support for switching SST 39VF640xB chips into QRY mode mtd: cfi_cmdset_0001: use defined value of P_ID_INTEL_PERFORMANCE instead of hardcoded one block2mtd: dubious assignment P4080/mtd: Fix the freescale lbc issue with 36bit mode P4080/eLBC: Make Freescale elbc interrupt common to elbc devices mtd: phram: use KBUILD_MODNAME mtd: OneNAND: S5PC110: Fix double call suspend & resume function mtd: nand: fix MTD_MODE_RAW writes jffs2: use kmemdup mtd: sm_ftl: cosmetic, use bool when possible mtd: r852: remove useless pci powerup/down from suspend/resume routines mtd: blktrans: fix a race vs kthread_stop mtd: blktrans: kill BKL mtd: allow to unload the mtdtrans module if its block devices aren't open ... Fix up trivial whitespace-introduced conflict in drivers/mtd/mtdchar.c
2010-10-30fs/compat.c: fix build on MIPS/s390wu zhangjin
The definition of PAGE_CACHE_MASK in <linux/pagemap.h> is needed to use MAX_RW_COUNT, and on x86-64 that gets done indirectly through the architecture header includes. But on MIPS and s390 that doesn't happen, and we need to make sure that fs/compat.c includes pagemap.h explicitly. Introduced in commit 435f49a518c7 ("readv/writev: do the same MAX_RW_COUNT truncation that read/write does"). Reported-by: Sachin Sant <sachinp@in.ibm.com> (S390) Reported-by: wu zhangjin <wuzhangjin@gmail.com> (MIPS) Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-30Merge branch 'master' of ↵David Woodhouse
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git Conflicts: drivers/mtd/mtd_blkdevs.c Merge Grant's device-tree bits so that we can apply the subsequent fixes. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-30Btrfs: deal with errors from updating the tree logChris Mason
During unlink we remove any references to the inode from the tree log. It can return -ENOENT and other errors, and this changes the unlink code to deal with it. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-10-30jbd2: Convert jbd2_slab_create_sem to mutexThomas Gleixner
jbd2_slab_create_sem is used as a mutex, so make it one. [ akpm muttered: We may as well make it local to jbd2_journal_create_slab() also. ] Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Ted Ts'o <tytso@mit.edu> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <alpine.LFD.2.00.1010162231480.2496@localhost6.localdomain6> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2010-10-30hpfs: Convert sbi->hpfs_creation_de to mutexThomas Gleixner
sbi->hpfs_creation_de is used as mutex so make it a mutex. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Christoph Hellwig <hch@infradead.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: linux-fsdevel@vger.kernel.org LKML-Reference: <20100907125056.228874895@linutronix.de>
2010-10-29Btrfs: allow subvol deletion by unprivileged user with -o user_subvol_rm_allowedSage Weil
Add a mount option user_subvol_rm_allowed that allows users to delete a (potentially non-empty!) subvol when they would otherwise we allowed to do an rmdir(2). We duplicate the may_delete() checks from the core VFS code to implement identical security checks (minus the directory size check). We additionally require that the user has write+exec permission on the subvol root inode. Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-10-29Btrfs: make SNAP_DESTROY asyncSage Weil
There is no reason to force an immediate commit when deleting a snapshot. Users have some expectation that space from a deleted snapshot be freed immediately, but even if we do commit the reclaim is a background process. If users _do_ want the deletion to be durable, they can call 'sync'. Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-10-29Btrfs: add SNAP_CREATE_ASYNC ioctlSage Weil
Create a snap without waiting for it to commit to disk. The ioctl is ordered such that subsequent operations will not be contained by the created snapshot, and the commit is initiated, but the ioctl does not wait for the snapshot to commit to disk. We return the specific transid to userspace so that an application can wait for this specific snapshot creation to commit via the WAIT_SYNC ioctl. Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-10-29Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ecryptfs/ecryptfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ecryptfs/ecryptfs-2.6: eCryptfs: Print mount_auth_tok_only param in ecryptfs_show_options ecryptfs: added ecryptfs_mount_auth_tok_only mount parameter ecryptfs: checking return code of ecryptfs_find_auth_tok_for_sig() ecryptfs: release keys loaded in ecryptfs_keyring_auth_tok_for_sig() eCryptfs: Clear LOOKUP_OPEN flag when creating lower file ecryptfs: call vfs_setxattr() in ecryptfs_setxattr()
2010-10-29Btrfs: add START_SYNC, WAIT_SYNC ioctlsSage Weil
START_SYNC will start a sync/commit, but not wait for it to complete. Any modification started after the ioctl returns is guaranteed not to be included in the commit. If a non-NULL pointer is passed, the transaction id will be returned to userspace. WAIT_SYNC will wait for any in-progress commit to complete. If a transaction id is specified, the ioctl will block and then return (success) when the specified transaction has committed. If it has already committed when we call the ioctl, it returns immediately. If the specified transaction doesn't exist, it returns EINVAL. If no transaction id is specified, WAIT_SYNC will wait for the currently committing transaction to finish it's commit to disk. If there is no currently committing transaction, it returns success. These ioctls are useful for applications which want to impose an ordering on when fs modifications reach disk, but do not want to wait for the full (slow) commit process to do so. Picky callers can take the transid returned by START_SYNC and feed it to WAIT_SYNC, and be certain to wait only as long as necessary for the transaction _they_ started to reach disk. Sloppy callers can START_SYNC and WAIT_SYNC without a transid, and provided they didn't wait too long between the calls, they will get the same result. However, if a second commit starts before they call WAIT_SYNC, they may end up waiting longer for it to commit as well. Even so, a START_SYNC+WAIT_SYNC still guarantees that any operation completed before the START_SYNC reaches disk. Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-10-29Btrfs: async transaction commitSage Weil
Add support for an async transaction commit that is ordered such that any subsequent operations will join the following transaction, but does not wait until the current commit is fully on disk. This avoids much of the latency associated with the btrfs_commit_transaction for callers concerned with serialization and not safety. The wait_for_unblock flag controls whether we wait for the 'middle' portion of commit_transaction to complete, which is necessary if the caller expects some of the modifications contained in the commit to be available (this is the case for subvol/snapshot creation). Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-10-29Btrfs: fix deadlock in btrfs_commit_transactionSage Weil
We calculate timeout (either 1 or MAX_SCHEDULE_TIMEOUT) based on whether num_writers > 1 or should_grow at the top of the loop. Then, much much later, we wait for that timeout if either num_writers or should_grow is true. However, it's possible for a racing process (calling btrfs_end_transaction()) to decrement num_writers such that we wait forever instead of for 1. Fix this by deciding how long to wait when we wait. Include a smp_mb() before checking if the waitqueue is active to ensure the num_writers is visible. Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-10-29Btrfs: fix lockdep warning on clone ioctlSage Weil
I'm no lockdep expert, but this appears to make the lockdep warning go away for the i_mutex locking in the clone ioctl. Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-10-29Btrfs: fix clone ioctl where range is adjacent to extentSage Weil
We had an edge case issue where the requested range was just following an existing extent. Instead of skipping to the next extent, we used the previous one which lead to having zero sized extents. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-10-29Btrfs: fix delalloc checks in clone ioctlSage Weil
The lookup_first_ordered_extent() was done on the wrong inode, and the ->delalloc_bytes test was wrong, as the following btrfs_wait_ordered_range() would only invoke a range write and wouldn't write the entire file data range. Also, a bad parameter was passed to btrfs_wait_ordered_range(). Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-10-29Btrfs: drop unused variable in block_alloc_rsvChris Mason
The alloc_target variable is not really used. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-10-29Btrfs: cleanup warnings from gcc 4.6 (nonbugs)Andi Kleen
These are all the cases where a variable is set, but not read which are not bugs as far as I can see, but simply leftovers. Still needs more review. Found by gcc 4.6's new warnings Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Chris Mason <chris.mason@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-10-29Btrfs: Fix variables set but not read (bugs found by gcc 4.6)Andi Kleen
These are all the cases where a variable is set, but not read which are really bugs. - Couple of incorrect error handling fixed. - One incorrect use of a allocation policy - Some other things Still needs more review. Found by gcc 4.6's new warnings. [akpm@linux-foundation.org: fix build. Might have been bitrot] Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Chris Mason <chris.mason@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-10-29Btrfs: Use ERR_CAST helpersJulia Lawall
Use ERR_CAST(x) rather than ERR_PTR(PTR_ERR(x)). The former makes more clear what is the purpose of the operation, which otherwise looks like a no-op. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ type T; T x; identifier f; @@ T f (...) { <+... - ERR_PTR(PTR_ERR(x)) + x ...+> } @@ expression x; @@ - ERR_PTR(PTR_ERR(x)) + ERR_CAST(x) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Cc: Chris Mason <chris.mason@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-10-29Btrfs: use memdup_user helpersJulia Lawall
Use memdup_user when user data is immediately copied into the allocated region. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression from,to,size,flag; position p; identifier l1,l2; @@ - to = \(kmalloc@p\|kzalloc@p\)(size,flag); + to = memdup_user(from,size); if ( - to==NULL + IS_ERR(to) || ...) { <+... when != goto l1; - -ENOMEM + PTR_ERR(to) ...+> } - if (copy_from_user(to, from, size) != 0) { - <+... when != goto l2; - -EFAULT - ...+> - } // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Cc: Chris Mason <chris.mason@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-10-29Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6: cifs: Cleanup and thus reduce smb session structure and fields used during authentication NTLM auth and sign - Use appropriate server challenge cifs: add kfree() on error path NTLM auth and sign - minor error corrections and cleanup NTLM auth and sign - Use kernel crypto apis to calculate hashes and smb signatures NTLM auth and sign - Define crypto hash functions and create and send keys needed for key exchange cifs: cifs_convert_address() returns zero on error NTLM auth and sign - Allocate session key/client response dynamically cifs: update comments - [s/GlobalSMBSesLock/cifs_file_list_lock/g] cifs: eliminate cifsInodeInfo->write_behind_rc (try #6) [CIFS] Fix checkpatch warnings and bump cifs version number cifs: wait for writeback to complete in cifs_flush cifs: convert cifsFileInfo->count to non-atomic counter
2010-10-29readv/writev: do the same MAX_RW_COUNT truncation that read/write doesLinus Torvalds
We used to protect against overflow, but rather than return an error, do what read/write does, namely to limit the total size to MAX_RW_COUNT. This is not only more consistent, but it also means that any broken low-level read/write routine that still keeps counts in 'int' can't break. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-29Merge git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-linusLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-linus: Squashfs: fix function prototype Squashfs: fix use of __le64 annotated variable
2010-10-29eCryptfs: Print mount_auth_tok_only param in ecryptfs_show_optionsTyler Hicks
When printing mount options, print the new ecryptfs_mount_auth_tok_only mount option. Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
2010-10-29ecryptfs: added ecryptfs_mount_auth_tok_only mount parameterRoberto Sassu
This patch adds a new mount parameter 'ecryptfs_mount_auth_tok_only' to force ecryptfs to use only authentication tokens which signature has been specified at mount time with parameters 'ecryptfs_sig' and 'ecryptfs_fnek_sig'. In this way, after disabling the passthrough and the encrypted view modes, it's possible to make available to users only files encrypted with the specified authentication token. Signed-off-by: Roberto Sassu <roberto.sassu@polito.it> Cc: Dustin Kirkland <kirkland@canonical.com> Cc: James Morris <jmorris@namei.org> [Tyler: Clean up coding style errors found by checkpatch] Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
2010-10-29ecryptfs: checking return code of ecryptfs_find_auth_tok_for_sig()Roberto Sassu
This patch replaces the check of the 'matching_auth_tok' pointer with the exit status of ecryptfs_find_auth_tok_for_sig(). This avoids to use authentication tokens obtained through the function ecryptfs_keyring_auth_tok_for_sig which are not valid. Signed-off-by: Roberto Sassu <roberto.sassu@polito.it> Cc: Dustin Kirkland <kirkland@canonical.com> Cc: James Morris <jmorris@namei.org> Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
2010-10-29ecryptfs: release keys loaded in ecryptfs_keyring_auth_tok_for_sig()Roberto Sassu
This patch allows keys requested in the function ecryptfs_keyring_auth_tok_for_sig()to be released when they are no longer required. In particular keys are directly released in the same function if the obtained authentication token is not valid. Further, a new function parameter 'auth_tok_key' has been added to ecryptfs_find_auth_tok_for_sig() in order to provide callers the key pointer to be passed to key_put(). Signed-off-by: Roberto Sassu <roberto.sassu@polito.it> Cc: Dustin Kirkland <kirkland@canonical.com> Cc: James Morris <jmorris@namei.org> [Tyler: Initialize auth_tok_key to NULL in ecryptfs_parse_packet_set] Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
2010-10-29eCryptfs: Clear LOOKUP_OPEN flag when creating lower fileTyler Hicks
eCryptfs was passing the LOOKUP_OPEN flag through to the lower file system, even though ecryptfs_create() doesn't support the flag. A valid filp for the lower filesystem could be returned in the nameidata if the lower file system's create() function supported LOOKUP_OPEN, possibly resulting in unencrypted writes to the lower file. However, this is only a potential problem in filesystems (FUSE, NFS, CIFS, CEPH, 9p) that eCryptfs isn't known to support today. https://bugs.launchpad.net/ecryptfs/+bug/641703 Reported-by: Kevin Buhr Cc: stable <stable@kernel.org> Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
2010-10-29ecryptfs: call vfs_setxattr() in ecryptfs_setxattr()Roberto Sassu
Ecryptfs is a stackable filesystem which relies on lower filesystems the ability of setting/getting extended attributes. If there is a security module enabled on the system it updates the 'security' field of inodes according to the owned extended attribute set with the function vfs_setxattr(). When this function is performed on a ecryptfs filesystem the 'security' field is not updated for the lower filesystem since the call security_inode_post_setxattr() is missing for the lower inode. Further, the call security_inode_setxattr() is missing for the lower inode, leading to policy violations in the security module because specific checks for this hook are not performed (i. e. filesystem 'associate' permission on SELinux is not checked for the lower filesystem). This patch replaces the call of the setxattr() method of the lower inode in the function ecryptfs_setxattr() with vfs_setxattr(). Signed-off-by: Roberto Sassu <roberto.sassu@polito.it> Cc: stable <stable@kernel.org> Cc: Dustin Kirkland <kirkland@canonical.com> Acked-by: James Morris <jmorris@namei.org> Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
2010-10-29Btrfs: fix raid code for removing missing drivesChris Mason
When btrfs is mounted in degraded mode, it has some internal structures to track the missing devices. This missing device is setup as readonly, but the mapping code can get upset when we try to write to it. This changes the mapping code to return -EIO instead of oops when we try to write to the readonly device. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-10-29Btrfs: Switch the extent buffer rbtree into a radix treeMiao Xie
This patch reduces the CPU time spent in the extent buffer search by using the radix tree instead of the rbtree and using the rcu lock instead of the spin lock. I did a quick test by the benchmark tool[1] and found the patch improve the file creation/deletion performance problem that I have reported[2]. Before applying this patch: Create files: Total files: 50000 Total time: 0.971531 Average time: 0.000019 Delete files: Total files: 50000 Total time: 1.366761 Average time: 0.000027 After applying this patch: Create files: Total files: 50000 Total time: 0.927455 Average time: 0.000019 Delete files: Total files: 50000 Total time: 1.292280 Average time: 0.000026 [1] http://marc.info/?l=linux-btrfs&m=128212635122920&q=p3 [2] http://marc.info/?l=linux-btrfs&m=128212635122920&w=2 Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-10-29Btrfs: restructure try_release_extent_buffer()Miao Xie
restructure try_release_extent_buffer() and write a function to release the extent buffer. It will be used later. Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-10-29Btrfs: use the flusher threads for delalloc throttlingChris Mason
We have a fairly complex set of loops around walking our list of delalloc inodes when we find metadata delalloc space running low. It doesn't work very well, can use large amounts of CPU and doesn't do very efficient writeback. This switches us to kick the bdi flusher threads instead. All dirty data in btrfs is accounted as delalloc data, so this is very similar in terms of what it writes, but we're able to just kick off the IO and wait for progress. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-10-29Btrfs: tune the chunk allocation to 5% of the FS as metadataChris Mason
An earlier commit tried to keep us from allocating too many empty metadata chunks. It was somewhat too restrictive and could lead to ENOSPC errors on empty filesystems. This increases the limits to about 5% of the FS size, allowing more metadata chunks to be preallocated. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-10-29Add new functions for triggering inode writebackChris Mason
When btrfs is running low on metadata space, it needs to force delayed allocation pages to disk. It currently does this with a suboptimal walk of a private list of inodes with delayed allocation, and it would be much better if we used the generic flusher threads. writeback_inodes_sb_if_idle would be ideal, but it waits for the flusher thread to start IO on all the dirty pages in the FS before it returns. This adds variants of writeback_inodes_sb* that allow the caller to control how many pages get sent down. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-10-29Btrfs: don't loop forever on bad btree blocksChris Mason
When btrfs discovers the generation number in a btree block is incorrect, it can loop forever without forcing the RAID code to try a valid mirror, and without returning EIO. This changes things to properly kick out the EIO. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-10-29Merge branch 'bug-fixes' of ↵Chris Mason
git://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-work Conflicts: fs/btrfs/extent-tree.c Signed-off-by: Chris Mason <chris.mason@oracle.com>
2010-10-29Btrfs: let the user know space caching is enabledJosef Bacik
If you mount -o space_cache, the option will be persistent across mounts, but to make sure the user knows that they did this, emit a message telling them if they didn't mount with -o space_cache but the feature is still used. Signed-off-by: Josef Bacik <josef@redhat.com>
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