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* Merge branch 'work.misc' of ↵Linus Torvalds2017-07-081-0/+2
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull misc filesystem updates from Al Viro: "Assorted normal VFS / filesystems stuff..." * 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: dentry name snapshots Make statfs properly return read-only state after emergency remount fs/dcache: init in_lookup_hashtable minix: Deinline get_block, save 2691 bytes fs: Reorder inode_owner_or_capable() to avoid needless fs: warn in case userspace lied about modprobe return
| * Make statfs properly return read-only state after emergency remountCarlos Maiolino2017-06-291-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Emergency remount (sysrq-u) sets MS_RDONLY to the superblock but doesn't set MNT_READONLY to the mount point. Once calculate_f_flags() only check for the mount point read only state, when setting kstatfs flags, after an emergency remount, statfs does not report the filesystem as read-only, even though it is. Enable flags_by_sb() to also check for superblock read only state, so the kstatfs and consequently statfs can properly show the read-only state of the filesystem. Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | compat statfs: switch to copy_to_user()Al Viro2017-06-041-28/+30
|/ | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* statfs: move compat syscalls from compat.cAl Viro2017-04-171-0/+140
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: misc struct path constificationAl Viro2016-12-051-1/+1
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: allow O_PATH file descriptors for fstatfs()Linus Torvalds2013-10-121-1/+1
| | | | | | | | | | | | | | | Olga reported that file descriptors opened with O_PATH do not work with fstatfs(), found during further development of ksh93's thread support. There is no reason to not allow O_PATH file descriptors here (fstatfs is very much a path operation), so use "fdget_raw()". See commit 55815f70147d ("vfs: make O_PATH file descriptors usable for 'fstat()'") for a very similar issue reported for fstat() by the same team. Reported-and-tested-by: ольга крыжановская <olga.kryzhanovska@gmail.com> Acked-by: Al Viro <viro@zeniv.linux.org.uk> Cc: stable@kernel.org # O_PATH introduced in 3.0+ Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* vfs: fix user_statfs to retry once on ESTALE errorsJeff Layton2012-12-201-1/+8
| | | | | Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* switch simple cases of fget_light to fdgetAl Viro2012-09-261-5/+4
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* switch statfs to fget_light/fput_lightAl Viro2012-05-291-2/+3
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* fs: reduce the use of module.h wherever possiblePaul Gortmaker2012-02-281-1/+1
| | | | | | | | | | For files only using THIS_MODULE and/or EXPORT_SYMBOL, map them onto including export.h -- or if the file isn't even using those, then just delete the include. Fix up any implicit include dependencies that were being masked by module.h along the way. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
* vfs: new helper - vfs_ustat()Al Viro2012-01-031-8/+13
| | | | | | | ... and bury user_get_super()/statfs_by_dentry() - they are purely internal now. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* VFS: fix statfs() automounter semantics regressionDan McGee2011-11-041-1/+1
| | | | | | | | | | | | | | | | | | No one in their right mind would expect statfs() to not work on a automounter managed mount point. Fix it. [ I'm not sure about the "no one in their right mind" part. It's not mounted, and you didn't ask for it to be mounted. But nobody will really care, and this probably makes it match previous semantics, so.. - Linus ] This mirrors the fix made to the quota code in 815d405ceff0d69646. Signed-off-by: Dan McGee <dpmcgee@gmail.com> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* clean statfs-like syscalls upAl Viro2011-03-141-95/+81
| | | | | | | | | | 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: Al Viro <viro@zeniv.linux.org.uk>
* add f_flags to struct statfs(64)Christoph Hellwig2010-08-091-1/+46
| | | | | | | | | | Add a flags field to help glibc implementing statvfs(3) efficiently. We copy the flag values from glibc, and add a new ST_VALID flag to denote that f_flags is implemented. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* pass a struct path to vfs_statfsChristoph Hellwig2010-08-091-24/+26
| | | | | | | | | | | | | | | | We'll need the path to implement the flags field for statvfs support. We do have it available in all callers except: - ecryptfs_statfs. This one doesn't actually need vfs_statfs but just needs to do a caller to the lower filesystem statfs method. - sys_ustat. Add a non-exported statfs_by_dentry helper for it which doesn't won't be able to fill out the flags field later on. In addition rename the helpers for statfs vs fstatfs to do_*statfs instead of the misleading vfs prefix. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Take statfs variants to fs/statfs.cAl Viro2010-05-211-0/+196
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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