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authorLinus Torvalds <torvalds@linux-foundation.org>2012-10-03 07:25:04 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-03 07:25:04 +0400
commitaab174f0df5d72d31caccf281af5f614fa254578 (patch)
tree2a172c5009c4ac8755e858593154c258ce7709a0 /mm
parentca41cc96b2813221b05af57d0355157924de5a07 (diff)
parent2bd2c1941f141ad780135ccc1cd08ca71a24f10a (diff)
downloadlinux-aab174f0df5d72d31caccf281af5f614fa254578.tar.xz
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 'mm')
-rw-r--r--mm/fadvise.c34
-rw-r--r--mm/fremap.c3
-rw-r--r--mm/mmap.c3
-rw-r--r--mm/nommu.c6
-rw-r--r--mm/readahead.c14
5 files changed, 28 insertions, 32 deletions
diff --git a/mm/fadvise.c b/mm/fadvise.c
index 9b75a045dbf4..a47f0f50c89f 100644
--- a/mm/fadvise.c
+++ b/mm/fadvise.c
@@ -26,7 +26,7 @@
*/
SYSCALL_DEFINE(fadvise64_64)(int fd, loff_t offset, loff_t len, int advice)
{
- struct file *file = fget(fd);
+ struct fd f = fdget(fd);
struct address_space *mapping;
struct backing_dev_info *bdi;
loff_t endbyte; /* inclusive */
@@ -35,15 +35,15 @@ SYSCALL_DEFINE(fadvise64_64)(int fd, loff_t offset, loff_t len, int advice)
unsigned long nrpages;
int ret = 0;
- if (!file)
+ if (!f.file)
return -EBADF;
- if (S_ISFIFO(file->f_path.dentry->d_inode->i_mode)) {
+ if (S_ISFIFO(f.file->f_path.dentry->d_inode->i_mode)) {
ret = -ESPIPE;
goto out;
}
- mapping = file->f_mapping;
+ mapping = f.file->f_mapping;
if (!mapping || len < 0) {
ret = -EINVAL;
goto out;
@@ -76,21 +76,21 @@ SYSCALL_DEFINE(fadvise64_64)(int fd, loff_t offset, loff_t len, int advice)
switch (advice) {
case POSIX_FADV_NORMAL:
- file->f_ra.ra_pages = bdi->ra_pages;
- spin_lock(&file->f_lock);
- file->f_mode &= ~FMODE_RANDOM;
- spin_unlock(&file->f_lock);
+ f.file->f_ra.ra_pages = bdi->ra_pages;
+ spin_lock(&f.file->f_lock);
+ f.file->f_mode &= ~FMODE_RANDOM;
+ spin_unlock(&f.file->f_lock);
break;
case POSIX_FADV_RANDOM:
- spin_lock(&file->f_lock);
- file->f_mode |= FMODE_RANDOM;
- spin_unlock(&file->f_lock);
+ spin_lock(&f.file->f_lock);
+ f.file->f_mode |= FMODE_RANDOM;
+ spin_unlock(&f.file->f_lock);
break;
case POSIX_FADV_SEQUENTIAL:
- file->f_ra.ra_pages = bdi->ra_pages * 2;
- spin_lock(&file->f_lock);
- file->f_mode &= ~FMODE_RANDOM;
- spin_unlock(&file->f_lock);
+ f.file->f_ra.ra_pages = bdi->ra_pages * 2;
+ spin_lock(&f.file->f_lock);
+ f.file->f_mode &= ~FMODE_RANDOM;
+ spin_unlock(&f.file->f_lock);
break;
case POSIX_FADV_WILLNEED:
/* First and last PARTIAL page! */
@@ -106,7 +106,7 @@ SYSCALL_DEFINE(fadvise64_64)(int fd, loff_t offset, loff_t len, int advice)
* Ignore return value because fadvise() shall return
* success even if filesystem can't retrieve a hint,
*/
- force_page_cache_readahead(mapping, file, start_index,
+ force_page_cache_readahead(mapping, f.file, start_index,
nrpages);
break;
case POSIX_FADV_NOREUSE:
@@ -128,7 +128,7 @@ SYSCALL_DEFINE(fadvise64_64)(int fd, loff_t offset, loff_t len, int advice)
ret = -EINVAL;
}
out:
- fput(file);
+ fdput(f);
return ret;
}
#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS
diff --git a/mm/fremap.c b/mm/fremap.c
index 9ed4fd432467..048659c0c03d 100644
--- a/mm/fremap.c
+++ b/mm/fremap.c
@@ -195,10 +195,9 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
*/
if (mapping_cap_account_dirty(mapping)) {
unsigned long addr;
- struct file *file = vma->vm_file;
+ struct file *file = get_file(vma->vm_file);
flags &= MAP_NONBLOCK;
- get_file(file);
addr = mmap_region(file, start, size,
flags, vma->vm_flags, pgoff);
fput(file);
diff --git a/mm/mmap.c b/mm/mmap.c
index ae18a48e7e4e..872441e81914 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1301,8 +1301,7 @@ munmap_back:
goto free_vma;
correct_wcount = 1;
}
- vma->vm_file = file;
- get_file(file);
+ vma->vm_file = get_file(file);
error = file->f_op->mmap(file, vma);
if (error)
goto unmap_and_free_vma;
diff --git a/mm/nommu.c b/mm/nommu.c
index d4b0c10872de..dee2ff89fd58 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1282,10 +1282,8 @@ unsigned long do_mmap_pgoff(struct file *file,
vma->vm_pgoff = pgoff;
if (file) {
- region->vm_file = file;
- get_file(file);
- vma->vm_file = file;
- get_file(file);
+ region->vm_file = get_file(file);
+ vma->vm_file = get_file(file);
if (vm_flags & VM_EXECUTABLE) {
added_exe_file_vma(current->mm);
vma->vm_mm = current->mm;
diff --git a/mm/readahead.c b/mm/readahead.c
index ea8f8fa21649..7963f2391236 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -579,19 +579,19 @@ do_readahead(struct address_space *mapping, struct file *filp,
SYSCALL_DEFINE(readahead)(int fd, loff_t offset, size_t count)
{
ssize_t ret;
- struct file *file;
+ struct fd f;
ret = -EBADF;
- file = fget(fd);
- if (file) {
- if (file->f_mode & FMODE_READ) {
- struct address_space *mapping = file->f_mapping;
+ f = fdget(fd);
+ if (f.file) {
+ if (f.file->f_mode & FMODE_READ) {
+ struct address_space *mapping = f.file->f_mapping;
pgoff_t start = offset >> PAGE_CACHE_SHIFT;
pgoff_t end = (offset + count - 1) >> PAGE_CACHE_SHIFT;
unsigned long len = end - start + 1;
- ret = do_readahead(mapping, file, start, len);
+ ret = do_readahead(mapping, f.file, start, len);
}
- fput(file);
+ fdput(f);
}
return ret;
}