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path: root/fs/reiserfs/xattr.c
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* sanitize xattr handler prototypesChristoph Hellwig2009-12-16
| | | | | | | | | | | | | | | | | | | | | Add a flags argument to struct xattr_handler and pass it to all xattr handler methods. This allows using the same methods for multiple handlers, e.g. for the ACL methods which perform exactly the same action for the access and default ACLs, just using a different underlying attribute. With a little more groundwork it'll also allow sharing the methods for the regular user/trusted/secure handlers in extN, ocfs2 and jffs2 like it's already done for xfs in this patch. Also change the inode argument to the handlers to a dentry to allow using the handlers mechnism for filesystems that require it later, e.g. cifs. [with GFS2 bits updated by Steven Whitehouse <swhiteho@redhat.com>] Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: James Morris <jmorris@namei.org> Acked-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* kill-the-bkl/reiserfs: fix "reiserfs lock" / "inode mutex" lock inversion ↵Frederic Weisbecker2009-09-14
| | | | | | | | | | | | | | | | | | | dependency reiserfs_xattr_init is called with the reiserfs write lock held, but if the ".reiserfs_priv" entry is not created, we take the superblock root directory inode mutex until .reiserfs_priv is created. This creates a lock dependency inversion against other sites such as reiserfs_file_release() which takes an inode mutex and the reiserfs lock after. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jeff Mahoney <jeffm@suse.com> Cc: Chris Mason <chris.mason@oracle.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Alexander Beregalov <a.beregalov@gmail.com> Cc: Laurent Riffard <laurent.riffard@free.fr>
* kill-the-bkl/reiserfs: acquire the inode mutex safelyFrederic Weisbecker2009-09-14
| | | | | | | | | | | | | | | | | | | | | | | | | While searching a pathname, an inode mutex can be acquired in do_lookup() which calls reiserfs_lookup() which in turn acquires the write lock. On the other side reiserfs_fill_super() can acquire the write_lock and then call reiserfs_lookup_privroot() which can acquire an inode mutex (the root of the mount point). So we theoretically risk an AB - BA lock inversion that could lead to a deadlock. As for other lock dependencies found since the bkl to mutex conversion, the fix is to use reiserfs_mutex_lock_safe() which drops the lock dependency to the write lock. [ Impact: fix a possible deadlock with reiserfs ] Cc: Jeff Mahoney <jeffm@suse.com> Cc: Chris Mason <chris.mason@oracle.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Alexander Beregalov <a.beregalov@gmail.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
* headers: smp_lock.h reduxAlexey Dobriyan2009-07-12
| | | | | | | | | | | | | * Remove smp_lock.h from files which don't need it (including some headers!) * Add smp_lock.h to files which do need it * Make smp_lock.h include conditional in hardirq.h It's needed only for one kernel_locked() usage which is under CONFIG_PREEMPT This will make hardirq.h inclusion cheaper for every PREEMPT=n config (which includes allmodconfig/allyesconfig, BTW) Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* reiserfs: allow exposing privroot w/ xattrs enabledJeff Mahoney2009-06-11
| | | | | | | This patch adds an -oexpose_privroot option to allow access to the privroot. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* reiserfs: fixup perms when xattrs are disabledJeff Mahoney2009-05-17
| | | | | | | | | | This adds CONFIG_REISERFS_FS_XATTR protection from reiserfs_permission. This is needed to avoid warnings during file deletions and chowns with xattrs disabled. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* reiserfs: deal with NULL xattr root w/ xattrs disabledJeff Mahoney2009-05-17
| | | | | | | | | This avoids an Oops in open_xa_root that can occur when deleting a file with xattrs disabled. It assumes that the xattr root will be there, and that is not guaranteed. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* reiserfs: clean up ifdefsJeff Mahoney2009-05-17
| | | | | | | | | | | With xattr cleanup even with xattrs disabled, much of the initial setup is still performed. Some #ifdefs are just not needed since the options they protect wouldn't be available anyway. This cleans those up. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* reiserfs: remove privroot hiding in lookupJeff Mahoney2009-05-09
| | | | | | | | | | | With Al Viro's patch to move privroot lookup to fs mount, there's no need to have special code to hide the privroot in reiserfs_lookup. I've also cleaned up the privroot hiding in reiserfs_readdir_dentry and removed the last user of reiserfs_xattrs(). Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* reiserfs: fixup xattr_root cachingJeff Mahoney2009-05-09
| | | | | | | | | | | | | The xattr_root caching was broken from my previous patch set. It wouldn't cause corruption, but could cause decreased performance due to allocating a larger chunk of the journal (~ 27 blocks) than it would actually use. This patch loads the xattr root dentry at xattr initialization and creates it on-demand. Since we're using the cached dentry, there's no point in keeping lookup_or_create_dir around, so that's removed. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Always lookup priv_root on reiserfs mount and keep itAl Viro2009-05-09
| | | | | | | | ... even if it's a negative dentry. That way we can set ->d_op on root before anyone could race with us. Simplify d_compare(), while we are at it. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* reiserfs: Expand i_mutex to enclose lookup_one_lenJeff Mahoney2009-05-09
| | | | | | | | | | | | | | 2.6.30-rc3 introduced some sanity checks in the VFS code to avoid NFS bugs by ensuring that lookup_one_len is always called under i_mutex. This patch expands the i_mutex locking to enclose lookup_one_len. This was always required, but not not enforced in the reiserfs code since it does locking around the xattr interactions with the xattr_sem. This is obvious enough, and it survived an overnight 50 thread ACL test. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* reiserfs: xattr_create is unused with xattrs disabledJeff Mahoney2009-03-30
| | | | | | | This patch ifdefs xattr_create when xattrs aren't enabled. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'reiserfs-updates' from Jeff MahoneyLinus Torvalds2009-03-30
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * reiserfs-updates: (35 commits) reiserfs: rename [cn]_* variables reiserfs: rename p_._ variables reiserfs: rename p_s_tb to tb reiserfs: rename p_s_inode to inode reiserfs: rename p_s_bh to bh reiserfs: rename p_s_sb to sb reiserfs: strip trailing whitespace reiserfs: cleanup path functions reiserfs: factor out buffer_info initialization reiserfs: add atomic addition of selinux attributes during inode creation reiserfs: use generic readdir for operations across all xattrs reiserfs: journaled xattrs reiserfs: use generic xattr handlers reiserfs: remove i_has_xattr_dir reiserfs: make per-inode xattr locking more fine grained reiserfs: eliminate per-super xattr lock reiserfs: simplify xattr internal file lookups/opens reiserfs: Clean up xattrs when REISERFS_FS_XATTR is unset reiserfs: remove IS_PRIVATE helpers reiserfs: remove link detection code ... Fixed up conflicts manually due to: - quota name cleanups vs variable naming changes: fs/reiserfs/inode.c fs/reiserfs/namei.c fs/reiserfs/stree.c fs/reiserfs/xattr.c - exported include header cleanups include/linux/reiserfs_fs.h
| * reiserfs: use generic readdir for operations across all xattrsJeff Mahoney2009-03-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current reiserfs xattr implementation open codes reiserfs_readdir and frees the path before calling the filldir function. Typically, the filldir function is something that modifies the file system, such as a chown or an inode deletion that also require reading of an inode associated with each direntry. Since the file system is modified, the path retained becomes invalid for the next run. In addition, it runs backwards in attempt to minimize activity. This is clearly suboptimal from a code cleanliness perspective as well as performance-wise. This patch implements a generic reiserfs_for_each_xattr that uses the generic readdir and a specific filldir routine that simply populates an array of dentries and then performs a specific operation on them. When all files have been operated on, it then calls the operation on the directory itself. The result is a noticable code reduction and better performance. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * reiserfs: journaled xattrsJeff Mahoney2009-03-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Deadlocks are possible in the xattr code between the journal lock and the xattr sems. This patch implements journalling for xattr operations. The benefit is twofold: * It gets rid of the deadlock possibility by always ensuring that xattr write operations are initiated inside a transaction. * It corrects the problem where xattr backing files aren't considered any differently than normal files, despite the fact they are metadata. I discussed the added journal load with Chris Mason, and we decided that since xattrs (versus other journal activity) is fairly rare, the introduction of larger transactions to support journaled xattrs wouldn't be too big a deal. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * reiserfs: use generic xattr handlersJeff Mahoney2009-03-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Christoph Hellwig had asked me quite some time ago to port the reiserfs xattrs to the generic xattr interface. This patch replaces the reiserfs-specific xattr handling code with the generic struct xattr_handler. However, since reiserfs doesn't split the prefix and name when accessing xattrs, it can't leverage generic_{set,get,list,remove}xattr without needlessly reconstructing the name on the back end. Update 7/26/07: Added missing dput() to deletion path. Update 8/30/07: Added missing mark_inode_dirty when i_mode is used to represent an ACL and no previous ACL existed. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * reiserfs: remove i_has_xattr_dirJeff Mahoney2009-03-30
| | | | | | | | | | | | | | | | With the changes to xattr root locking, the i_has_xattr_dir flag is no longer needed. This patch removes it. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * reiserfs: make per-inode xattr locking more fine grainedJeff Mahoney2009-03-30
| | | | | | | | | | | | | | | | | | | | The per-inode locking can be made more fine-grained to surround just the interaction with the filesystem itself. This really only applies to protecting reads during a write, since concurrent writes are barred with inode->i_mutex at the vfs level. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * reiserfs: eliminate per-super xattr lockJeff Mahoney2009-03-30
| | | | | | | | | | | | | | | | | | | | With the switch to using inode->i_mutex locking during lookups/creation in the xattr root, the per-super xattr lock is no longer needed. This patch removes it. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * reiserfs: simplify xattr internal file lookups/opensJeff Mahoney2009-03-30
| | | | | | | | | | | | | | | | | | | | The xattr file open/lookup code is needlessly complex. We can use vfs-level operations to perform the same work, and also simplify the locking constraints. The locking advantages will be exploited in future patches. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * reiserfs: Clean up xattrs when REISERFS_FS_XATTR is unsetJeff Mahoney2009-03-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The current reiserfs xattr implementation will not clean up old xattr files if files are deleted when REISERFS_FS_XATTR is unset. This results in inaccessible lost files, wasting space. This patch compiles in basic xattr knowledge, such as how to delete them and change ownership for quota tracking. If the file system has never used xattrs, then the operation is quite fast: it returns immediately when it sees there is no .reiserfs_priv directory. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * reiserfs: remove IS_PRIVATE helpersJeff Mahoney2009-03-30
| | | | | | | | | | | | | | | | | | | | There are a number of helper functions for marking a reiserfs inode private that were leftover from reiserfs did its own thing wrt to private inodes. S_PRIVATE has been in the kernel for some time, so this patch removes the helpers and uses IS_PRIVATE instead. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * reiserfs: remove link detection codeJeff Mahoney2009-03-30
| | | | | | | | | | | | | | | | | | | | Early in the reiserfs xattr development, there was a plan to use hardlinks to save disk space for identical xattrs. That code never materialized and isn't going to, so this patch removes the detection code. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * reiserfs: xattr reiserfs_get_page takes offset instead of indexJeff Mahoney2009-03-30
| | | | | | | | | | | | | | | | This patch changes reiserfs_get_page to take an offset rather than an index since no callers calculate the index differently. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * reiserfs: small variable cleanupJeff Mahoney2009-03-30
| | | | | | | | | | | | | | | | This patch removes the xinode and mapping variables from reiserfs_xattr_{get,set}. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * reiserfs: use reiserfs_error()Jeff Mahoney2009-03-30
| | | | | | | | | | | | | | | | This patch makes many paths that are currently using warnings to handle the error. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * reiserfs: rework reiserfs_warningJeff Mahoney2009-03-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ReiserFS warnings can be somewhat inconsistent. In some cases: * a unique identifier may be associated with it * the function name may be included * the device may be printed separately This patch aims to make warnings more consistent. reiserfs_warning() prints the device name, so printing it a second time is not required. The function name for a warning is always helpful in debugging, so it is now automatically inserted into the output. Hans has stated that every warning should have a unique identifier. Some cases lack them, others really shouldn't have them. reiserfs_warning() now expects an id associated with each message. In the rare case where one isn't needed, "" will suffice. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * reiserfs: make some warnings informationalJeff Mahoney2009-03-30
| | | | | | | | | | | | | | | | | | In several places, reiserfs_warning is used when there is no warning, just a notice. This patch changes some of them to indicate that the message is merely informational. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | constify dentry_operations: misc filesystemsAl Viro2009-03-27
|/ | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* fs/reiserfs: use an IS_ERR test rather than a NULL testJulien Brunel2008-10-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In case of error, the function open_xa_dir returns an ERR pointer, but never returns a NULL pointer. So a NULL test that comes after an IS_ERR test should be deleted. The semantic match that finds this problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @match_bad_null_test@ expression x, E; statement S1,S2; @@ x = open_xa_dir(...) ... when != x = E ( * if (x == NULL && ...) S1 else S2 | * if (x == NULL || ...) S1 else S2 ) // </smpl> Signed-off-by: Julien Brunel <brunel@diku.dk> Signed-off-by: Julia Lawall <julia@diku.dk> Cc: Jeff Mahoney <jeffm@suse.com> Cc: Jan Kara <jack@ucw.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] sanitize ->permission() prototypeAl Viro2008-07-26
| | | | | | | | | | | | | | | * kill nameidata * argument; map the 3 bits in ->flags anybody cares about to new MAY_... ones and pass with the mask. * kill redundant gfs2_iop_permission() * sanitize ecryptfs_permission() * fix remaining places where ->permission() instances might barf on new MAY_... found in mask. The obvious next target in that direction is permission(9) folded fix for nfs_permission() breakage from Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* fs: Remove unnecessary inclusions of asm/semaphore.hMatthew Wilcox2008-04-18
| | | | | | | None of these files use any of the functionality promised by asm/semaphore.h. Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
* [PATCH] reiserfs: eliminate private use of struct file in xattrJeff Mahoney2008-03-19
| | | | | | | | | | | | | | | | | | | | | After several posts and bug reports regarding interaction with the NULL nameidata, here's a patch to clean up the mess with struct file in the reiserfs xattr code. As observed in several of the posts, there's really no need for struct file to exist in the xattr code. It was really only passed around due to the f_op->readdir() and a_ops->{prepare,commit}_write prototypes requiring it. reiserfs_prepare_write() and reiserfs_commit_write() don't actually use the struct file passed to it, and the xattr code uses a private version of reiserfs_readdir() to enumerate the xattr directories. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Acked-by: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Convert ERR_PTR(PTR_ERR(p)) instances to ERR_CAST(p)David Howells2008-02-07
| | | | | | | | | | Convert instances of ERR_PTR(PTR_ERR(p)) to ERR_CAST(p) using: perl -spi -e 's/ERR_PTR[(]PTR_ERR[(](.*)[)][)]/ERR_CAST(\1)/' `grep -rl 'ERR_PTR[(]*PTR_ERR' fs crypto net security` Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fs/reiserfs/xattr.c: use LIST_HEAD instead of LIST_HEAD_INITDenis Cheng2008-02-06
| | | | | | | | Signed-off-by: Denis Cheng <crquan@gmail.com> Cc: Chris Mason <chris.mason@oracle.com> Cc: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* reiserfs: fix up lockdep warningsJeff Mahoney2007-10-19
| | | | | | | | Add I_MUTEX_XATTR annotations to the inode locking in the reiserfs xattr code. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* reiserfs: convert to new aopsVladimir Saveliev2007-10-16
| | | | | | | | | Convert reiserfs to new aops Signed-off-by: Vladimir Saveliev <vs@namesys.com> Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: make read_cache_page synchronousNick Piggin2007-05-07
| | | | | | | | | | | | | | | | Ensure pages are uptodate after returning from read_cache_page, which allows us to cut out most of the filesystem-internal PageUptodate calls. I didn't have a great look down the call chains, but this appears to fixes 7 possible use-before uptodate in hfs, 2 in hfsplus, 1 in jfs, a few in ecryptfs, 1 in jffs2, and a possible cleared data overwritten with readpage in block2mtd. All depending on whether the filler is async and/or can return with a !uptodate page. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* reiserfs: suppress lockdep warningJeff Mahoney2007-04-30
| | | | | | | | | | | | | We're getting lockdep warnings due to a post-2.6.21-rc7 bugfix. The xattr_sem can never be taken in the manner described. Internal inodes are protected by I_PRIVATE. Add the appropriate annotation. Cc: <stable@kernel.org> Cc: "Antonino A. Daplas" <adaplas@pol.net> Cc: Takashi Iwai <tiwai@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* reiserfs: fix xattr root locking/refcount bugJeff Mahoney2007-04-24
| | | | | | | | | | | | | | | | | | | | | | The listxattr() and getxattr() operations are only protected by a read lock. As a result, if either of these operations run in parallel, a race condition exists where the xattr_root will end up being cached twice, which results in the leaking of a reference and a BUG() on umount. This patch refactors get_xa_root(), __get_xa_root(), and create_xa_root(), into one get_xa_root() function that takes the appropriate locking around the entire critical section. Reported, diagnosed and tested by Andrea Righi <a.righi@cineca.it> Signed-off-by: Jeff Mahoney <jeffm@suse.com> Cc: Andrea Righi <a.righi@cineca.it> Cc: "Vladimir V. Saveliev" <vs@namesys.com> Cc: Edward Shishkin <edward@namesys.com> Cc: Alex Zarochentsev <zam@namesys.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] struct path: convert reiserfsJosef Sipek2006-12-08
| | | | | | Signed-off-by: Josef Sipek <jsipek@fsl.cs.sunysb.edu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [NET]: Kill direct includes of asm/checksum.hAl Viro2006-12-03
| | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
* [PATCH] VFS: Make filldir_t and struct kstat deal in 64-bit inode numbersDavid Howells2006-10-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | These patches make the kernel pass 64-bit inode numbers internally when communicating to userspace, even on a 32-bit system. They are required because some filesystems have intrinsic 64-bit inode numbers: NFS3+ and XFS for example. The 64-bit inode numbers are then propagated to userspace automatically where the arch supports it. Problems have been seen with userspace (eg: ld.so) using the 64-bit inode number returned by stat64() or getdents64() to differentiate files, and failing because the 64-bit inode number space was compressed to 32-bits, and so overlaps occur. This patch: Make filldir_t take a 64-bit inode number and struct kstat carry a 64-bit inode number so that 64-bit inode numbers can be passed back to userspace. The stat functions then returns the full 64-bit inode number where available and where possible. If it is not possible to represent the inode number supplied by the filesystem in the field provided by userspace, then error EOVERFLOW will be issued. Similarly, the getdents/readdir functions now pass the full 64-bit inode number to userspace where possible, returning EOVERFLOW instead when a directory entry is encountered that can't be properly represented. Note that this means that some inodes will not be stat'able on a 32-bit system with old libraries where they were before - but it does mean that there will be no ambiguity over what a 32-bit inode number refers to. Note similarly that directory scans may be cut short with an error on a 32-bit system with old libraries where the scan would work before for the same reasons. It is judged unlikely that this situation will occur because modern glibc uses 64-bit capable versions of stat and getdents class functions exclusively, and that older systems are unlikely to encounter unrepresentable inode numbers anyway. [akpm: alpha build fix] Signed-off-by: David Howells <dhowells@redhat.com> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] lockdep: annotate reiserfsIngo Molnar2006-08-27
| | | | | | | | | reiserfs seems to have another locking level layer for the i_mutex due to the xattrs-are-a-directory thing. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] read_mapping_page for address spacePekka Enberg2006-06-23
| | | | | | | | | | Add read_mapping_page() which is used for callers that pass mapping->a_ops->readpage as the filler for read_cache_page. This removes some duplication from filesystem code. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] reiserfs: use generic_permissionChristoph Hellwig2006-02-01
| | | | | | | | | | | Use the generic_permission code with a proper wrapper and callback instead of having a local copy. Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Jeff Mahoney <jeffm@suse.com> Cc: Chris Mason <mason@suse.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] reiserfs: remove reiserfs_permission_lockedChristoph Hellwig2006-02-01
| | | | | | | | | | | | This function is completely unused since the xattr permission checking changes. Remove it and fold __reiserfs_permission into reiserfs_permission. Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Jeff Mahoney <jeffm@suse.com> Cc: Chris Mason <mason@suse.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] reiserfs: remove kmalloc wrapperPekka Enberg2006-02-01
| | | | | | | | | Remove kmalloc() wrapper from fs/reiserfs/. Please note that a reiserfs /proc entry format is changed because kmalloc statistics is removed. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] capable/capability.h (fs/)Randy Dunlap2006-01-11
| | | | | | | | | fs: Use <linux/capability.h> where capable() is used. Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Acked-by: Tim Schmielau <tim@physik3.uni-rostock.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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