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authorAlexey Dobriyan <adobriyan@gmail.com>2021-05-07 04:02:16 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2021-05-07 05:24:11 +0300
commitd4455faccd6cbe11ddfdbe28723a2122453b4f4e (patch)
tree259db030de708622b3215088c3eb664c36b85a4b /fs
parentb793cd9ab34da3c571a038219d1d6315f91e5afd (diff)
downloadlinux-d4455faccd6cbe11ddfdbe28723a2122453b4f4e.tar.xz
proc: mandate ->proc_lseek in "struct proc_ops"
Now that proc_ops are separate from file_operations and other operations it easy to check all instances to have ->proc_lseek hook and remove check in main code. Note: nonseekable_open() files naturally don't require ->proc_lseek. Garbage collect pde_lseek() function. [adobriyan@gmail.com: smoke test lseek()] Link: https://lkml.kernel.org/r/YG4OIhChOrVTPgdN@localhost.localdomain Link: https://lkml.kernel.org/r/YFYX0Bzwxlc7aBa/@localhost.localdomain Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/proc/inode.c14
1 files changed, 2 insertions, 12 deletions
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index bde6b6f69852..2ea8aaa7206e 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -273,25 +273,15 @@ void proc_entry_rundown(struct proc_dir_entry *de)
spin_unlock(&de->pde_unload_lock);
}
-static loff_t pde_lseek(struct proc_dir_entry *pde, struct file *file, loff_t offset, int whence)
-{
- typeof_member(struct proc_ops, proc_lseek) lseek;
-
- lseek = pde->proc_ops->proc_lseek;
- if (!lseek)
- lseek = default_llseek;
- return lseek(file, offset, whence);
-}
-
static loff_t proc_reg_llseek(struct file *file, loff_t offset, int whence)
{
struct proc_dir_entry *pde = PDE(file_inode(file));
loff_t rv = -EINVAL;
if (pde_is_permanent(pde)) {
- return pde_lseek(pde, file, offset, whence);
+ return pde->proc_ops->proc_lseek(file, offset, whence);
} else if (use_pde(pde)) {
- rv = pde_lseek(pde, file, offset, whence);
+ rv = pde->proc_ops->proc_lseek(file, offset, whence);
unuse_pde(pde);
}
return rv;