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-rw-r--r--fs/cifs/cifsfs.c2
-rw-r--r--fs/gfs2/ops_file.c4
-rw-r--r--fs/ncpfs/file.c12
-rw-r--r--fs/nfs/file.c6
-rw-r--r--fs/read_write.c38
-rw-r--r--fs/smbfs/file.c11
-rw-r--r--include/linux/fs.h3
7 files changed, 42 insertions, 34 deletions
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 427a7c695896..aeff0fe5b6b9 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -581,7 +581,7 @@ static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
if (retval < 0)
return (loff_t)retval;
}
- return remote_llseek(file, offset, origin);
+ return generic_file_llseek_unlocked(file, offset, origin);
}
struct file_system_type cifs_fs_type = {
diff --git a/fs/gfs2/ops_file.c b/fs/gfs2/ops_file.c
index e1b7d525a066..24dd59450088 100644
--- a/fs/gfs2/ops_file.c
+++ b/fs/gfs2/ops_file.c
@@ -62,11 +62,11 @@ static loff_t gfs2_llseek(struct file *file, loff_t offset, int origin)
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY,
&i_gh);
if (!error) {
- error = remote_llseek(file, offset, origin);
+ error = generic_file_llseek_unlocked(file, offset, origin);
gfs2_glock_dq_uninit(&i_gh);
}
} else
- error = remote_llseek(file, offset, origin);
+ error = generic_file_llseek_unlocked(file, offset, origin);
return error;
}
diff --git a/fs/ncpfs/file.c b/fs/ncpfs/file.c
index 2b145de45b39..6a7d901f1936 100644
--- a/fs/ncpfs/file.c
+++ b/fs/ncpfs/file.c
@@ -18,6 +18,7 @@
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/sched.h>
+#include <linux/smp_lock.h>
#include <linux/ncp_fs.h>
#include "ncplib_kernel.h"
@@ -281,9 +282,18 @@ static int ncp_release(struct inode *inode, struct file *file) {
return 0;
}
+static loff_t ncp_remote_llseek(struct file *file, loff_t offset, int origin)
+{
+ loff_t ret;
+ lock_kernel();
+ ret = generic_file_llseek_unlocked(file, offset, origin);
+ unlock_kernel();
+ return ret;
+}
+
const struct file_operations ncp_file_operations =
{
- .llseek = remote_llseek,
+ .llseek = ncp_remote_llseek,
.read = ncp_file_read,
.write = ncp_file_write,
.ioctl = ncp_ioctl,
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 3536b01164f9..a34eb78989f5 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -170,6 +170,7 @@ force_reval:
static loff_t nfs_file_llseek(struct file *filp, loff_t offset, int origin)
{
+ loff_t loff;
/* origin == SEEK_END => we must revalidate the cached file length */
if (origin == SEEK_END) {
struct inode *inode = filp->f_mapping->host;
@@ -177,7 +178,10 @@ static loff_t nfs_file_llseek(struct file *filp, loff_t offset, int origin)
if (retval < 0)
return (loff_t)retval;
}
- return remote_llseek(filp, offset, origin);
+ lock_kernel(); /* BKL needed? */
+ loff = generic_file_llseek_unlocked(filp, offset, origin);
+ unlock_kernel();
+ return loff;
}
/*
diff --git a/fs/read_write.c b/fs/read_write.c
index f0d1240a5c69..9ba495d5a29b 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -31,12 +31,12 @@ const struct file_operations generic_ro_fops = {
EXPORT_SYMBOL(generic_ro_fops);
-loff_t generic_file_llseek(struct file *file, loff_t offset, int origin)
+loff_t
+generic_file_llseek_unlocked(struct file *file, loff_t offset, int origin)
{
loff_t retval;
struct inode *inode = file->f_mapping->host;
- mutex_lock(&inode->i_mutex);
switch (origin) {
case SEEK_END:
offset += inode->i_size;
@@ -46,42 +46,26 @@ loff_t generic_file_llseek(struct file *file, loff_t offset, int origin)
}
retval = -EINVAL;
if (offset>=0 && offset<=inode->i_sb->s_maxbytes) {
+ /* Special lock needed here? */
if (offset != file->f_pos) {
file->f_pos = offset;
file->f_version = 0;
}
retval = offset;
}
- mutex_unlock(&inode->i_mutex);
return retval;
}
+EXPORT_SYMBOL(generic_file_llseek_unlocked);
-EXPORT_SYMBOL(generic_file_llseek);
-
-loff_t remote_llseek(struct file *file, loff_t offset, int origin)
+loff_t generic_file_llseek(struct file *file, loff_t offset, int origin)
{
- loff_t retval;
-
- lock_kernel();
- switch (origin) {
- case SEEK_END:
- offset += i_size_read(file->f_path.dentry->d_inode);
- break;
- case SEEK_CUR:
- offset += file->f_pos;
- }
- retval = -EINVAL;
- if (offset>=0 && offset<=file->f_path.dentry->d_inode->i_sb->s_maxbytes) {
- if (offset != file->f_pos) {
- file->f_pos = offset;
- file->f_version = 0;
- }
- retval = offset;
- }
- unlock_kernel();
- return retval;
+ loff_t n;
+ mutex_lock(&file->f_dentry->d_inode->i_mutex);
+ n = generic_file_llseek_unlocked(file, offset, origin);
+ mutex_unlock(&file->f_dentry->d_inode->i_mutex);
+ return n;
}
-EXPORT_SYMBOL(remote_llseek);
+EXPORT_SYMBOL(generic_file_llseek);
loff_t no_llseek(struct file *file, loff_t offset, int origin)
{
diff --git a/fs/smbfs/file.c b/fs/smbfs/file.c
index efbe29af3d7a..2294783320cb 100644
--- a/fs/smbfs/file.c
+++ b/fs/smbfs/file.c
@@ -422,9 +422,18 @@ smb_file_permission(struct inode *inode, int mask, struct nameidata *nd)
return error;
}
+static loff_t smb_remote_llseek(struct file *file, loff_t offset, int origin)
+{
+ loff_t ret;
+ lock_kernel();
+ ret = generic_file_llseek_unlocked(file, offset, origin);
+ unlock_kernel();
+ return ret;
+}
+
const struct file_operations smb_file_operations =
{
- .llseek = remote_llseek,
+ .llseek = smb_remote_llseek,
.read = do_sync_read,
.aio_read = smb_file_aio_read,
.write = do_sync_write,
diff --git a/include/linux/fs.h b/include/linux/fs.h
index f413085f748e..b158e5161bca 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1871,7 +1871,8 @@ extern void
file_ra_state_init(struct file_ra_state *ra, struct address_space *mapping);
extern loff_t no_llseek(struct file *file, loff_t offset, int origin);
extern loff_t generic_file_llseek(struct file *file, loff_t offset, int origin);
-extern loff_t remote_llseek(struct file *file, loff_t offset, int origin);
+extern loff_t generic_file_llseek_unlocked(struct file *file, loff_t offset,
+ int origin);
extern int generic_file_open(struct inode * inode, struct file * filp);
extern int nonseekable_open(struct inode * inode, struct file * filp);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.