- 22 2月, 2011 1 次提交
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由 Tao Ma 提交于
Remove mlog(0) from fs/ocfs2/inode.c and the masklog INODE. Signed-off-by: NTao Ma <boyu.mt@taobao.com>
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- 21 2月, 2011 1 次提交
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由 Tao Ma 提交于
ocfs2_iget is used to get/create inode. Only iget5_locked will give us an inode = NULL. So move this check ahead of ocfs2_read_locked_inode so that we don't need to check inode before we read and unlock inode. This is also helpful for trace event(see the next patch). Signed-off-by: NTao Ma <boyu.mt@taobao.com>
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- 22 2月, 2011 1 次提交
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由 Tao Ma 提交于
This is the 2nd step to remove the debug info of INODE. Signed-off-by: NTao Ma <boyu.mt@taobao.com>
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- 21 2月, 2011 1 次提交
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由 Tao Ma 提交于
As there are no such debug information in fs/ocfs2/ioctl.c, fs/ocfs2/locks.c and fs/ocfs2/sysfile.c, ML_INODE are also removed. Signed-off-by: NTao Ma <boyu.mt@taobao.com>
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- 22 2月, 2011 8 次提交
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由 Tao Ma 提交于
Change all the "mlog(0," in fs/ocfs2/mmap.c to trace events. And finally remove masklog FILE_IO. Signed-off-by: NTao Ma <boyu.mt@taobao.com>
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由 Tao Ma 提交于
Remove all the "mlog(0," in fs/ocfs2/aops.c. Signed-off-by: NTao Ma <boyu.mt@taobao.com>
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由 Tao Ma 提交于
Change all the "mlog(0," in fs/ocfs2/refcounttree.c to trace events. And finally remove masklog ML_REFCOUNT. Signed-off-by: NTao Ma <boyu.mt@taobao.com>
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由 Tao Ma 提交于
Since all 4 files, localalloc.c, suballoc.c, alloc.c and resize.c, which use DISK_ALLOC are changed to trace events, Remove masklog DISK_ALLOC totally. Signed-off-by: NTao Ma <boyu.mt@taobao.com>
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由 Tao Ma 提交于
This is the 4th step to remove the debug info of DISK_ALLOC. Signed-off-by: NTao Ma <boyu.mt@taobao.com>
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由 Tao Ma 提交于
This is the 3rd step to remove the debug info of DISK_ALLOC. Signed-off-by: NTao Ma <boyu.mt@taobao.com>
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由 Tao Ma 提交于
This is the 2nd step to remove the debug info of DISK_ALLOC. So this patch removes all mlog(0,...) from localalloc.c and adds the corresponding tracepoints. Different mlogs have different solutions. 1. Some are replaced with trace event directly. 2. Some are replaced while some new parameters are added. 3. Some are combined into one trace events. 4. Some redundant mlogs are removed. Signed-off-by: NTao Ma <boyu.mt@taobao.com>
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由 Tao Ma 提交于
This is the first try of replacing debug mlog(0,...) to trace events. Wengang has did some work in his original patch http://oss.oracle.com/pipermail/ocfs2-devel/2009-November/005513.html But he didn't finished it. So this patch removes all mlog(0,...) from alloc.c and adds the corresponding trace events. Different mlogs have different solutions. 1. Some are replaced with trace event directly. 2. Some are replaced and some new parameters are added since I think we need to know the btree owner in that case. 3. Some are combined into one trace events. 4. Some redundant mlogs are removed. What's more, it defines some event classes so that we can use them later. Cc: Wengang Wang <wen.gang.wang@oracle.com> Signed-off-by: NTao Ma <boyu.mt@taobao.com>
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- 21 2月, 2011 1 次提交
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由 Wengang Wang 提交于
About one year ago, Wengang Wang tried some first steps to add tracepoints to ocfs2. Hiss original patch is here: http://oss.oracle.com/pipermail/ocfs2-devel/2009-November/005512.html But as Steven Rostedt indicated in his article http://lwn.net/Articles/383362/, we'd better have our trace files resides in fs/ocfs2, so I rewrited the patch using the method Steven mentioned in that article. Signed-off-by: NWengang Wang <wen.gang.wang@oracle.com> Signed-off-by: NTao Ma <boyu.mt@taobao.com>
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- 07 3月, 2011 1 次提交
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由 Tao Ma 提交于
mlog_exit is used to record the exit status of a function. But because it is added in so many functions, if we enable it, the system logs get filled up quickly and cause too much I/O. So actually no one can open it for a production system or even for a test. This patch just try to remove it or change it. So: 1. if all the error paths already use mlog_errno, it is just removed. Otherwise, it will be replaced by mlog_errno. 2. if it is used to print some return value, it is replaced with mlog(0,...). mlog_exit_ptr is changed to mlog(0. All those mlog(0,...) will be replaced with trace events later. Signed-off-by: NTao Ma <boyu.mt@taobao.com>
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- 21 2月, 2011 1 次提交
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由 Tao Ma 提交于
ENTRY is used to record the entry of a function. But because it is added in so many functions, if we enable it, the system logs get filled up quickly and cause too much I/O. So actually no one can open it for a production system or even for a test. So for mlog_entry_void, we just remove it. for mlog_entry(...), we replace it with mlog(0,...), and they will be replace by trace event later. Signed-off-by: NTao Ma <boyu.mt@taobao.com>
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- 16 3月, 2011 9 次提交
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由 Trond Myklebust 提交于
The new vfs locking scheme introduced in 2.6.38 breaks NFS sillyrename because the latter relies on being able to determine the parent directory of the dentry in the ->iput() callback in order to send the appropriate unlink rpc call. Looking at the code that cares about races with dput(), there doesn't seem to be anything that specifically uses d_parent as a test for whether or not there is a race: - __d_lookup_rcu(), __d_lookup() all test for d_hashed() after d_parent - shrink_dcache_for_umount() is safe since nothing else can rearrange the dentries in that super block. - have_submount(), select_parent() and d_genocide() can test for a deletion if we set the DCACHE_DISCONNECTED flag when the dentry is removed from the parent's d_subdirs list. Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com> Cc: stable@kernel.org (2.6.38, needs commit c826cb7d "dcache.c: create helper function for duplicated functionality" ) Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Linus Torvalds 提交于
This creates a helper function for he "try to ascend into the parent directory" case, which was written out in triplicate before. With all the locking and subtle sequence number stuff, we really don't want to duplicate that kind of code. Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Al Viro 提交于
* pull the handling of current->total_link_count into __do_follow_link() * put the common "do ->put_link() if needed and path_put() the link" stuff into a helper (put_link(nd, link, cookie)) * rename __do_follow_link() to follow_link(), while we are at it Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
The last remaining place (resolution of nested symlink) converted to the loop of the same kind we have in path_lookupat() and path_openat(). Note that we still *do* have a recursion in pathname resolution; can't avoid it, really. However, it's strictly for nested symlinks now - i.e. ones in the middle of a pathname. link_path_walk() has lost the tail now - it always walks everything except the last component. do_follow_link() renamed to nested_symlink() and moved down. Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
Now that link_path_walk() is called without LOOKUP_PARENT only from do_follow_link(), we can simplify the checks in last component handling. First of all, checking if we'd arrived to a directory is not needed - the caller will check it anyway. And LOOKUP_FOLLOW is guaranteed to be there, since we only get to that place with nd->depth > 0. Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
Now the only caller of link_path_walk() that does *not* pass LOOKUP_PARENT is do_follow_link() Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
... and note that we only need to do it for LAST_BIND symlinks Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
new helper: walk_component(). Handles everything except symlinks; returns negative on error, 0 on success and 1 on symlinks we decided to follow. Drops out of RCU mode on such symlinks. link_path_walk() and do_last() switched to using that. Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Aneesh Kumar K.V 提交于
We don't want to allow creation of private hardlinks by different application using the fd passed to them via SCM_RIGHTS. So limit the null relative name usage in linkat syscall to CAP_DAC_READ_SEARCH Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
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- 15 3月, 2011 13 次提交
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由 Al Viro 提交于
Just need to make sure that AF_UNIX garbage collector won't confuse O_PATHed socket on filesystem for real AF_UNIX opened socket. Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
For readlinkat() we simply allow empty pathname; it will fail unless we have dfd equal to O_PATH-opened symlink, so we are outside of POSIX scope here. For fchownat() and fstatat() we allow AT_EMPTY_PATH; let the caller explicitly ask for such behaviour. Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
At that point we can't do almost nothing with them. They can be opened with O_PATH, we can manipulate such descriptors with dup(), etc. and we can see them in /proc/*/{fd,fdinfo}/*. We can't (and won't be able to) follow /proc/*/fd/* symlinks for those; there's simply not enough information for pathname resolution to go on from such point - to resolve a symlink we need to know which directory does it live in. We will be able to do useful things with them after the next commit, though - readlinkat() and fchownat() will be possible to use with dfd being an O_PATH-opened symlink and empty relative pathname. Combined with open_by_handle() it'll give us a way to do realink-by-handle and lchown-by-handle without messing with more redundant syscalls. Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
New flag for open(2) - O_PATH. Semantics: * pathname is resolved, but the file itself is _NOT_ opened as far as filesystem is concerned. * almost all operations on the resulting descriptors shall fail with -EBADF. Exceptions are: 1) operations on descriptors themselves (i.e. close(), dup(), dup2(), dup3(), fcntl(fd, F_DUPFD), fcntl(fd, F_DUPFD_CLOEXEC, ...), fcntl(fd, F_GETFD), fcntl(fd, F_SETFD, ...)) 2) fcntl(fd, F_GETFL), for a common non-destructive way to check if descriptor is open 3) "dfd" arguments of ...at(2) syscalls, i.e. the starting points of pathname resolution * closing such descriptor does *NOT* affect dnotify or posix locks. * permissions are checked as usual along the way to file; no permission checks are applied to the file itself. Of course, giving such thing to syscall will result in permission checks (at the moment it means checking that starting point of ....at() is a directory and caller has exec permissions on it). fget() and fget_light() return NULL on such descriptors; use of fget_raw() and fget_raw_light() is needed to get them. That protects existing code from dealing with those things. There are two things still missing (they come in the next commits): one is handling of symlinks (right now we refuse to open them that way; see the next commit for semantics related to those) and another is descriptor passing via SCM_RIGHTS datagrams. Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Aneesh Kumar K.V 提交于
File system UUID is made available to application via /proc/<pid>/mountinfo Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Aneesh Kumar K.V 提交于
File system UUID is made available to application via /proc/<pid>/mountinfo Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Aneesh Kumar K.V 提交于
We add a per superblock uuid field. File systems should update the uuid in the fill_super callback Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Aneesh Kumar K.V 提交于
Now that VFS check for inode->i_nlink == 0 and returns proper error, remove similar check from file system Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Aneesh Kumar K.V 提交于
Add inode->i_nlink == 0 check in VFS. Some of the file systems do this internally. A followup patch will remove those instance. This is needed to ensure that with link by handle we don't allow to create hardlink of an unlinked file. The check also prevent a race between unlink and link Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Aneesh Kumar K.V 提交于
[AV: duplicate of open() guts removed; file_open_root() used instead] Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Aneesh Kumar K.V 提交于
The syscall also return mount id which can be used to lookup file system specific information such as uuid in /proc/<pid>/mountinfo Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
For name_to_handle_at(2) we'll want both ...at()-style syscall that would be usable for non-directory descriptors (with empty relative pathname). Introduce new flag (AT_EMPTY_PATH) to deal with that and corresponding LOOKUP_EMPTY; teach user_path_at() and path_init() to deal with the latter. Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Timo Warns 提交于
The kernel automatically evaluates partition tables of storage devices. The code for evaluating OSF partitions contains a bug that leaks data from kernel heap memory to userspace for certain corrupted OSF partitions. In more detail: for (i = 0 ; i < le16_to_cpu(label->d_npartitions); i++, partition++) { iterates from 0 to d_npartitions - 1, where d_npartitions is read from the partition table without validation and partition is a pointer to an array of at most 8 d_partitions. Add the proper and obvious validation. Signed-off-by: NTimo Warns <warns@pre-sense.de> Cc: stable@kernel.org [ Changed the patch trivially to not repeat the whole le16_to_cpu() thing, and to use an explicit constant for the magic value '8' ] Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 14 3月, 2011 3 次提交
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由 Aneesh Kumar K.V 提交于
The exportfs encode handle function should return the minimum required handle size. This helps user to find out the handle size by passing 0 handle size in the first step and then redoing to the call again with the returned handle size value. Acked-by: NSerge Hallyn <serue@us.ibm.com> Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
New helpers: user_statfs() and fd_statfs(), taking userland pathname and descriptor resp. and filling struct kstatfs. Syscalls of statfs family (native, compat and foreign - osf and hpux on alpha and parisc resp.) switched to those. Removes some boilerplate code, simplifies cleanup on errors... Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
new function: file_open_root(dentry, mnt, name, flags) opens the file vfs_path_lookup would arrive to. Note that name can be empty; in that case the usual requirement that dentry should be a directory is lifted. open-coded equivalents switched to it, may_open() got down exactly one caller and became static. Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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