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2013-10-25seq_file: always update file->f_pos in seq_lseek()Gu Zheng
This issue was first pointed out by Jiaxing Wang several months ago, but no further comments: https://lkml.org/lkml/2013/6/29/41 As we know pread() does not change f_pos, so after pread(), file->f_pos and m->read_pos become different. And seq_lseek() does not update file->f_pos if offset equals to m->read_pos, so after pread() and seq_lseek()(lseek to m->read_pos), then a subsequent read may read from a wrong position, the following program produces the problem: char str1[32] = { 0 }; char str2[32] = { 0 }; int poffset = 10; int count = 20; /*open any seq file*/ int fd = open("/proc/modules", O_RDONLY); pread(fd, str1, count, poffset); printf("pread:%s\n", str1); /*seek to where m->read_pos is*/ lseek(fd, poffset+count, SEEK_SET); /*supposed to read from poffset+count, but this read from position 0*/ read(fd, str2, count); printf("read:%s\n", str2); out put: pread: ck_netbios_ns 12665 read: nf_conntrack_netbios /proc/modules: nf_conntrack_netbios_ns 12665 0 - Live 0xffffffffa038b000 nf_conntrack_broadcast 12589 1 nf_conntrack_netbios_ns, Live 0xffffffffa0386000 So we always update file->f_pos to offset in seq_lseek() to fix this issue. Signed-off-by: Jiaxing Wang <hello.wjx@gmail.com> Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-25f2fs: add tracepoint for vm_page_mkwriteJaegeuk Kim
This patch adds a tracepoint for f2fs_vm_page_mkwrite. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-10-25f2fs: add tracepoint for set_page_dirtyJaegeuk Kim
This patch adds a tracepoint for set_page_dirty. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-10-25f2fs: remove redundant set_page_dirty from write_compacted_summariesChao Yu
Previously, set_page_dirty is called every time after writting one summary info into compacted summary page, To avoid redundant set_page_dirty, we only call set_page_dirty before release page. Signed-off-by: Yu Chao <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-10-25f2fs: add reclaiming control by sysfsJaegeuk Kim
This patch adds a control method in sysfs to reclaim prefree segments. Signed-off-by: Changman Lee <cm224.lee@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-10-25f2fs: introduce f2fs_balance_fs_bg for some background jobsJaegeuk Kim
This patch merges some background jobs into this new function. Signed-off-by: Changman Lee <cm224.lee@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-10-25f2fs: reclaim prefree segments periodicallyJaegeuk Kim
Previously, f2fs postpones reclaiming prefree segments into free segments as much as possible. However, if user writes and deletes a bunch of data without any sync or fsync calls, some flash storages can suffer from garbage collections. So, this patch adds the reclaiming codes to f2fs_write_node_pages and background GC thread. If there are a lot of prefree segments, let's do checkpoint so that f2fs submits discard commands for the prefree regions to the flash storage. Signed-off-by: Changman Lee <cm224.lee@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-10-25f2fs: use bool for booleansHaicheng Li
Signed-off-by: Haicheng Li <haicheng.li@linux.intel.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-10-25f2fs: clean up several status-related operationsJaegeuk Kim
This patch cleans up improper definitions that update some status information. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-10-25Merge tag 'ecryptfs-3.12-rc7-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tyhicks/ecryptfs Pull ecryptfs fixes from Tyler Hicks: "Two important fixes - Fix long standing memory leak in the (rarely used) public key support - Fix large file corruption on 32 bit architectures" * tag 'ecryptfs-3.12-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tyhicks/ecryptfs: eCryptfs: fix 32 bit corruption issue ecryptfs: Fix memory leakage in keystore.c
2013-10-25sysfs: fix sysfs_write_file for bin fileMing Lei
Before patch(sysfs: prepare path write for unified regular / bin file handling), when size of bin file is zero, writting still can continue, but this patch changes the behaviour. The worse thing is that firmware loader is broken by this patch, and user space application can't write to firmware bin file any more because both firmware loader and drivers can't know at advance how large the firmware file is and have to set its initialized size as zero. This patch fixes the problem and keeps behaviour of writting to bin as before. Reported-by: Lothar Waßmann <LW@karo-electronics.de> Tested-by: Lothar Waßmann <LW@karo-electronics.de> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Ming Lei <ming.lei@canonical.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-10-24fuse: rcu-delay freeing fuse_connAl Viro
makes ->permission() and ->d_revalidate() safety in RCU mode independent from vfsmount_lock. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24ncpfs: rcu-delay unload_nls() and freeing ncp_serverAl Viro
makes ->d_hash() and ->d_compare() safety in RCU mode independent from vfsmount_lock. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24fat: rcu-delay unloading nls and freeing sbiAl Viro
makes ->d_hash() and ->d_compare() safety in RCU mode independent from vfsmount_lock. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24cifs: rcu-delay unload_nls() and freeing sbiAl Viro
makes ->d_hash(), ->d_compare() and ->permission() safety in RCU mode independent from vfsmount_lock. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24autofs4: make freeing sbi rcu-delayedAl Viro
makes ->d_managed() safety in RCU mode independent from vfsmount_lock Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24adfs: delayed freeing of sbiAl Viro
makes ->d_hash() and ->d_compare() safety in RCU mode independent from vfsmount_lock. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24hpfs: make freeing sbi and codetables rcu-delayedAl Viro
makes ->d_hash() and ->d_compare() safety in RCU mode independent from vfsmount_lock Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24make freeing super_block rcu-delayedAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24vfs: introduce d_instantiate_no_diralias()Miklos Szeredi
...which just returns -EBUSY if a directory alias would be created. This is to be used by fuse mkdir to make sure that a buggy or malicious userspace filesystem doesn't do anything nasty. Previously fuse used a private mutex for this purpose, which can now go away. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
2013-10-24move taking vfsmount_lock down into prepend_path()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24split __lookup_mnt() in two functionsAl Viro
Instead of passing the direction as argument (and checking it on every step through the hash chain), just have separate __lookup_mnt() and __lookup_mnt_last(). And use the standard iterators... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24uninline destroy_super(), consolidate alloc_super()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24isofs: don't pass dentry to isofs_hash{i,}_common()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24new helpers: lock_mount_hash/unlock_mount_hashAl Viro
aka br_write_{lock,unlock} of vfsmount_lock. Inlines in fs/mount.h, vfsmount_lock extern moved over there as well. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24don't bother with vfsmount_lock in mounts_poll()Al Viro
wake_up_interruptible/poll_wait provide sufficient barriers; just use ACCESS_ONCE() to fetch ns->event and that's it. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24namespace.c: get rid of mnt_ghostsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24fold dup_mnt_ns() into its only surviving callerAl Viro
should've been done 6 years ago... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24mnt_set_expiry() doesn't need vfsmount_lockAl Viro
->mnt_expire is protected by namespace_sem Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24finish_automount() doesn't need vfsmount_lock for removal from expiry listAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24fs/namespace.c: bury long-dead defineAl Viro
MNT_WRITER_UNDERFLOW_LIMIT has been missed 4 years ago when it became unused. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24fold mntfree() into mntput_no_expire()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24do_remount(): pull touch_mnt_namespace() upAl Viro
... and don't bother with dropping and regaining vfsmount_lock Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24dup_mnt_ns(): get rid of pointless grabbing of vfsmount_lockAl Viro
mnt_list is protected by namespace_sem, not vfsmount_lock Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24fs_is_visible only needs namespace_sem held sharedAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24initialize namespace_sem staticallyAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24file->f_op is never NULL...Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24consolidate the reassignments of ->f_op in ->open() instancesAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24put_mnt_ns(): use drop_collected_mounts()Al Viro
... rather than open-coding it Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24ncpfs: switch to %p[dD]Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24ubifs: switch to %pdAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24nfsd: switch to %p[dD]Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24nfs: use %p[dD] instead of open-coded (and often racy) equivalentsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24befs: split symlink iops in two - for short and long symlinks resp.Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24new helper: kfree_put_link()Al Viro
duplicated to hell and back... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24libfs: get exports to definitions of objects being exported...Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24ecryptfs: ->lower_path.dentry is never NULLAl Viro
... on anything found via ->d_fsdata Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24ecryptfs: get rid of ecryptfs_set_dentry_lower{,_mnt}Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24ecryptfs: don't leave RCU pathwalk immediatelyAl Viro
If the underlying dentry doesn't have ->d_revalidate(), there's no need to force dropping out of RCU mode. All we need for that is to make freeing ecryptfs_dentry_info RCU-delayed. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-10-24ecryptfs: check DCACHE_OP_REVALIDATE instead of ->d_opAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
generated by cgit (git 2.34.1) at 2025-09-19 05:01:29 +0000