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authorLinus Torvalds <torvalds@linux-foundation.org>2012-10-02 20:25:04 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-02 20:25:04 -0700
commitaab174f0df5d72d31caccf281af5f614fa254578 (patch)
tree2a172c5009c4ac8755e858593154c258ce7709a0 /fs/namei.c
parentca41cc96b2813221b05af57d0355157924de5a07 (diff)
parent2bd2c1941f141ad780135ccc1cd08ca71a24f10a (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs update from Al Viro: - big one - consolidation of descriptor-related logics; almost all of that is moved to fs/file.c (BTW, I'm seriously tempted to rename the result to fd.c. As it is, we have a situation when file_table.c is about handling of struct file and file.c is about handling of descriptor tables; the reasons are historical - file_table.c used to be about a static array of struct file we used to have way back). A lot of stray ends got cleaned up and converted to saner primitives, disgusting mess in android/binder.c is still disgusting, but at least doesn't poke so much in descriptor table guts anymore. A bunch of relatively minor races got fixed in process, plus an ext4 struct file leak. - related thing - fget_light() partially unuglified; see fdget() in there (and yes, it generates the code as good as we used to have). - also related - bits of Cyrill's procfs stuff that got entangled into that work; _not_ all of it, just the initial move to fs/proc/fd.c and switch of fdinfo to seq_file. - Alex's fs/coredump.c spiltoff - the same story, had been easier to take that commit than mess with conflicts. The rest is a separate pile, this was just a mechanical code movement. - a few misc patches all over the place. Not all for this cycle, there'll be more (and quite a few currently sit in akpm's tree)." Fix up trivial conflicts in the android binder driver, and some fairly simple conflicts due to two different changes to the sock_alloc_file() interface ("take descriptor handling from sock_alloc_file() to callers" vs "net: Providing protocol type via system.sockprotoname xattr of /proc/PID/fd entries" adding a dentry name to the socket) * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (72 commits) MAX_LFS_FILESIZE should be a loff_t compat: fs: Generic compat_sys_sendfile implementation fs: push rcu_barrier() from deactivate_locked_super() to filesystems btrfs: reada_extent doesn't need kref for refcount coredump: move core dump functionality into its own file coredump: prevent double-free on an error path in core dumper usb/gadget: fix misannotations fcntl: fix misannotations ceph: don't abuse d_delete() on failure exits hypfs: ->d_parent is never NULL or negative vfs: delete surplus inode NULL check switch simple cases of fget_light to fdget new helpers: fdget()/fdput() switch o2hb_region_dev_write() to fget_light() proc_map_files_readdir(): don't bother with grabbing files make get_file() return its argument vhost_set_vring(): turn pollstart/pollstop into bool switch prctl_set_mm_exe_file() to fget_light() switch xfs_find_handle() to fget_light() switch xfs_swapext() to fget_light() ...
Diffstat (limited to 'fs/namei.c')
-rw-r--r--fs/namei.c41
1 files changed, 18 insertions, 23 deletions
diff --git a/fs/namei.c b/fs/namei.c
index a856e7f7b6e..aa30d19e9ed 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1797,8 +1797,6 @@ static int path_init(int dfd, const char *name, unsigned int flags,
struct nameidata *nd, struct file **fp)
{
int retval = 0;
- int fput_needed;
- struct file *file;
nd->last_type = LAST_ROOT; /* if there are only slashes... */
nd->flags = flags | LOOKUP_JUMPED;
@@ -1850,44 +1848,41 @@ static int path_init(int dfd, const char *name, unsigned int flags,
get_fs_pwd(current->fs, &nd->path);
}
} else {
+ struct fd f = fdget_raw(dfd);
struct dentry *dentry;
- file = fget_raw_light(dfd, &fput_needed);
- retval = -EBADF;
- if (!file)
- goto out_fail;
+ if (!f.file)
+ return -EBADF;
- dentry = file->f_path.dentry;
+ dentry = f.file->f_path.dentry;
if (*name) {
- retval = -ENOTDIR;
- if (!S_ISDIR(dentry->d_inode->i_mode))
- goto fput_fail;
+ if (!S_ISDIR(dentry->d_inode->i_mode)) {
+ fdput(f);
+ return -ENOTDIR;
+ }
retval = inode_permission(dentry->d_inode, MAY_EXEC);
- if (retval)
- goto fput_fail;
+ if (retval) {
+ fdput(f);
+ return retval;
+ }
}
- nd->path = file->f_path;
+ nd->path = f.file->f_path;
if (flags & LOOKUP_RCU) {
- if (fput_needed)
- *fp = file;
+ if (f.need_put)
+ *fp = f.file;
nd->seq = __read_seqcount_begin(&nd->path.dentry->d_seq);
lock_rcu_walk();
} else {
- path_get(&file->f_path);
- fput_light(file, fput_needed);
+ path_get(&nd->path);
+ fdput(f);
}
}
nd->inode = nd->path.dentry->d_inode;
return 0;
-
-fput_fail:
- fput_light(file, fput_needed);
-out_fail:
- return retval;
}
static inline int lookup_last(struct nameidata *nd, struct path *path)
@@ -3971,7 +3966,7 @@ EXPORT_SYMBOL(user_path_at);
EXPORT_SYMBOL(follow_down_one);
EXPORT_SYMBOL(follow_down);
EXPORT_SYMBOL(follow_up);
-EXPORT_SYMBOL(get_write_access); /* binfmt_aout */
+EXPORT_SYMBOL(get_write_access); /* nfsd */
EXPORT_SYMBOL(getname);
EXPORT_SYMBOL(lock_rename);
EXPORT_SYMBOL(lookup_one_len);