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-rw-r--r--fs/lockd/clntproc.c6
-rw-r--r--fs/lockd/svc4proc.c2
-rw-r--r--fs/lockd/svclock.c7
-rw-r--r--fs/lockd/svcproc.c2
-rw-r--r--fs/nfs/dir.c62
-rw-r--r--fs/nfs/file.c4
-rw-r--r--fs/nfs/inode.c71
-rw-r--r--fs/nfs/nfs4proc.c2
-rw-r--r--fs/nfs/nfs4state.c2
-rw-r--r--fs/nfs/super.c4
-rw-r--r--fs/nfs/write.c15
11 files changed, 99 insertions, 78 deletions
diff --git a/fs/lockd/clntproc.c b/fs/lockd/clntproc.c
index fd7d4669776..1f6dc518505 100644
--- a/fs/lockd/clntproc.c
+++ b/fs/lockd/clntproc.c
@@ -224,7 +224,9 @@ void nlm_release_call(struct nlm_rqst *call)
static void nlmclnt_rpc_release(void *data)
{
+ lock_kernel();
nlm_release_call(data);
+ unlock_kernel();
}
static int nlm_wait_on_grace(wait_queue_head_t *queue)
@@ -710,7 +712,9 @@ static void nlmclnt_unlock_callback(struct rpc_task *task, void *data)
die:
return;
retry_rebind:
+ lock_kernel();
nlm_rebind_host(req->a_host);
+ unlock_kernel();
retry_unlock:
rpc_restart_call(task);
}
@@ -788,7 +792,9 @@ retry_cancel:
/* Don't ever retry more than 3 times */
if (req->a_retries++ >= NLMCLNT_MAX_RETRIES)
goto die;
+ lock_kernel();
nlm_rebind_host(req->a_host);
+ unlock_kernel();
rpc_restart_call(task);
rpc_delay(task, 30 * HZ);
}
diff --git a/fs/lockd/svc4proc.c b/fs/lockd/svc4proc.c
index 385437e3387..2e27176ff42 100644
--- a/fs/lockd/svc4proc.c
+++ b/fs/lockd/svc4proc.c
@@ -248,7 +248,9 @@ static void nlm4svc_callback_exit(struct rpc_task *task, void *data)
static void nlm4svc_callback_release(void *data)
{
+ lock_kernel();
nlm_release_call(data);
+ unlock_kernel();
}
static const struct rpc_call_ops nlm4svc_callback_ops = {
diff --git a/fs/lockd/svclock.c b/fs/lockd/svclock.c
index 81aca859bfd..56a08ab9a4c 100644
--- a/fs/lockd/svclock.c
+++ b/fs/lockd/svclock.c
@@ -795,6 +795,7 @@ static void nlmsvc_grant_callback(struct rpc_task *task, void *data)
dprintk("lockd: GRANT_MSG RPC callback\n");
+ lock_kernel();
/* if the block is not on a list at this point then it has
* been invalidated. Don't try to requeue it.
*
@@ -804,7 +805,7 @@ static void nlmsvc_grant_callback(struct rpc_task *task, void *data)
* for nlm_blocked?
*/
if (list_empty(&block->b_list))
- return;
+ goto out;
/* Technically, we should down the file semaphore here. Since we
* move the block towards the head of the queue only, no harm
@@ -818,13 +819,17 @@ static void nlmsvc_grant_callback(struct rpc_task *task, void *data)
}
nlmsvc_insert_block(block, timeout);
svc_wake_up(block->b_daemon);
+out:
+ unlock_kernel();
}
static void nlmsvc_grant_release(void *data)
{
struct nlm_rqst *call = data;
+ lock_kernel();
nlmsvc_release_block(call->a_block);
+ unlock_kernel();
}
static const struct rpc_call_ops nlmsvc_grant_ops = {
diff --git a/fs/lockd/svcproc.c b/fs/lockd/svcproc.c
index 88379cc6e0b..ce6952b50a7 100644
--- a/fs/lockd/svcproc.c
+++ b/fs/lockd/svcproc.c
@@ -278,7 +278,9 @@ static void nlmsvc_callback_exit(struct rpc_task *task, void *data)
static void nlmsvc_callback_release(void *data)
{
+ lock_kernel();
nlm_release_call(data);
+ unlock_kernel();
}
static const struct rpc_call_ops nlmsvc_callback_ops = {
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index b1940660502..28a238dab23 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -139,10 +139,8 @@ nfs_opendir(struct inode *inode, struct file *filp)
nfs_inc_stats(inode, NFSIOS_VFSOPEN);
- lock_kernel();
/* Call generic open code in order to cache credentials */
res = nfs_open(inode, filp);
- unlock_kernel();
return res;
}
@@ -536,8 +534,6 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
(long long)filp->f_pos);
nfs_inc_stats(inode, NFSIOS_VFSGETDENTS);
- lock_kernel();
-
/*
* filp->f_pos points to the dirent entry number.
* *desc->dir_cookie has the cookie for the next entry. We have
@@ -595,7 +591,6 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
}
out:
nfs_unblock_sillyrename(dentry);
- unlock_kernel();
if (res > 0)
res = 0;
dfprintk(FILE, "NFS: readdir(%s/%s) returns %ld\n",
@@ -779,7 +774,6 @@ static int nfs_lookup_revalidate(struct dentry * dentry, struct nameidata *nd)
struct nfs_fattr fattr;
parent = dget_parent(dentry);
- lock_kernel();
dir = parent->d_inode;
nfs_inc_stats(dir, NFSIOS_DENTRYREVALIDATE);
inode = dentry->d_inode;
@@ -817,7 +811,6 @@ static int nfs_lookup_revalidate(struct dentry * dentry, struct nameidata *nd)
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
out_valid:
- unlock_kernel();
dput(parent);
dfprintk(LOOKUPCACHE, "NFS: %s(%s/%s) is valid\n",
__func__, dentry->d_parent->d_name.name,
@@ -836,7 +829,6 @@ out_zap_parent:
shrink_dcache_parent(dentry);
}
d_drop(dentry);
- unlock_kernel();
dput(parent);
dfprintk(LOOKUPCACHE, "NFS: %s(%s/%s) is invalid\n",
__func__, dentry->d_parent->d_name.name,
@@ -870,6 +862,14 @@ static int nfs_dentry_delete(struct dentry *dentry)
}
+static void nfs_drop_nlink(struct inode *inode)
+{
+ spin_lock(&inode->i_lock);
+ if (inode->i_nlink > 0)
+ drop_nlink(inode);
+ spin_unlock(&inode->i_lock);
+}
+
/*
* Called when the dentry loses inode.
* We use it to clean up silly-renamed files.
@@ -881,10 +881,8 @@ static void nfs_dentry_iput(struct dentry *dentry, struct inode *inode)
NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA;
if (dentry->d_flags & DCACHE_NFSFS_RENAMED) {
- lock_kernel();
drop_nlink(inode);
nfs_complete_unlink(dentry, inode);
- unlock_kernel();
}
iput(inode);
}
@@ -915,8 +913,6 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru
res = ERR_PTR(-ENOMEM);
dentry->d_op = NFS_PROTO(dir)->dentry_ops;
- lock_kernel();
-
/*
* If we're doing an exclusive create, optimize away the lookup
* but don't hash the dentry.
@@ -924,7 +920,7 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru
if (nfs_is_exclusive_create(dir, nd)) {
d_instantiate(dentry, NULL);
res = NULL;
- goto out_unlock;
+ goto out;
}
parent = dentry->d_parent;
@@ -952,8 +948,6 @@ no_entry:
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
out_unblock_sillyrename:
nfs_unblock_sillyrename(parent);
-out_unlock:
- unlock_kernel();
out:
return res;
}
@@ -1011,9 +1005,7 @@ static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry
}
/* Open the file on the server */
- lock_kernel();
res = nfs4_atomic_open(dir, dentry, nd);
- unlock_kernel();
if (IS_ERR(res)) {
error = PTR_ERR(res);
switch (error) {
@@ -1075,9 +1067,7 @@ static int nfs_open_revalidate(struct dentry *dentry, struct nameidata *nd)
* operations that change the directory. We therefore save the
* change attribute *before* we do the RPC call.
*/
- lock_kernel();
ret = nfs4_open_revalidate(dir, dentry, openflags, nd);
- unlock_kernel();
out:
dput(parent);
if (!ret)
@@ -1230,14 +1220,11 @@ static int nfs_create(struct inode *dir, struct dentry *dentry, int mode,
if ((nd->flags & LOOKUP_CREATE) != 0)
open_flags = nd->intent.open.flags;
- lock_kernel();
error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags, nd);
if (error != 0)
goto out_err;
- unlock_kernel();
return 0;
out_err:
- unlock_kernel();
d_drop(dentry);
return error;
}
@@ -1260,14 +1247,11 @@ nfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
attr.ia_mode = mode;
attr.ia_valid = ATTR_MODE;
- lock_kernel();
status = NFS_PROTO(dir)->mknod(dir, dentry, &attr, rdev);
if (status != 0)
goto out_err;
- unlock_kernel();
return 0;
out_err:
- unlock_kernel();
d_drop(dentry);
return status;
}
@@ -1286,15 +1270,12 @@ static int nfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
attr.ia_valid = ATTR_MODE;
attr.ia_mode = mode | S_IFDIR;
- lock_kernel();
error = NFS_PROTO(dir)->mkdir(dir, dentry, &attr);
if (error != 0)
goto out_err;
- unlock_kernel();
return 0;
out_err:
d_drop(dentry);
- unlock_kernel();
return error;
}
@@ -1311,14 +1292,12 @@ static int nfs_rmdir(struct inode *dir, struct dentry *dentry)
dfprintk(VFS, "NFS: rmdir(%s/%ld), %s\n",
dir->i_sb->s_id, dir->i_ino, dentry->d_name.name);
- lock_kernel();
error = NFS_PROTO(dir)->rmdir(dir, &dentry->d_name);
/* Ensure the VFS deletes this inode */
if (error == 0 && dentry->d_inode != NULL)
clear_nlink(dentry->d_inode);
else if (error == -ENOENT)
nfs_dentry_handle_enoent(dentry);
- unlock_kernel();
return error;
}
@@ -1420,7 +1399,7 @@ static int nfs_safe_remove(struct dentry *dentry)
error = NFS_PROTO(dir)->remove(dir, &dentry->d_name);
/* The VFS may want to delete this inode */
if (error == 0)
- drop_nlink(inode);
+ nfs_drop_nlink(inode);
nfs_mark_for_revalidate(inode);
} else
error = NFS_PROTO(dir)->remove(dir, &dentry->d_name);
@@ -1443,7 +1422,6 @@ static int nfs_unlink(struct inode *dir, struct dentry *dentry)
dfprintk(VFS, "NFS: unlink(%s/%ld, %s)\n", dir->i_sb->s_id,
dir->i_ino, dentry->d_name.name);
- lock_kernel();
spin_lock(&dcache_lock);
spin_lock(&dentry->d_lock);
if (atomic_read(&dentry->d_count) > 1) {
@@ -1452,7 +1430,6 @@ static int nfs_unlink(struct inode *dir, struct dentry *dentry)
/* Start asynchronous writeout of the inode */
write_inode_now(dentry->d_inode, 0);
error = nfs_sillyrename(dir, dentry);
- unlock_kernel();
return error;
}
if (!d_unhashed(dentry)) {
@@ -1466,7 +1443,6 @@ static int nfs_unlink(struct inode *dir, struct dentry *dentry)
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
} else if (need_rehash)
d_rehash(dentry);
- unlock_kernel();
return error;
}
@@ -1503,13 +1479,9 @@ static int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *sym
attr.ia_mode = S_IFLNK | S_IRWXUGO;
attr.ia_valid = ATTR_MODE;
- lock_kernel();
-
page = alloc_page(GFP_HIGHUSER);
- if (!page) {
- unlock_kernel();
+ if (!page)
return -ENOMEM;
- }
kaddr = kmap_atomic(page, KM_USER0);
memcpy(kaddr, symname, pathlen);
@@ -1524,7 +1496,6 @@ static int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *sym
dentry->d_name.name, symname, error);
d_drop(dentry);
__free_page(page);
- unlock_kernel();
return error;
}
@@ -1542,7 +1513,6 @@ static int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *sym
} else
__free_page(page);
- unlock_kernel();
return 0;
}
@@ -1556,14 +1526,12 @@ nfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)
old_dentry->d_parent->d_name.name, old_dentry->d_name.name,
dentry->d_parent->d_name.name, dentry->d_name.name);
- lock_kernel();
d_drop(dentry);
error = NFS_PROTO(dir)->link(inode, dir, &dentry->d_name);
if (error == 0) {
atomic_inc(&inode->i_count);
d_add(dentry, inode);
}
- unlock_kernel();
return error;
}
@@ -1603,7 +1571,6 @@ static int nfs_rename(struct inode *old_dir, struct dentry *old_dentry,
* To prevent any new references to the target during the rename,
* we unhash the dentry and free the inode in advance.
*/
- lock_kernel();
if (!d_unhashed(new_dentry)) {
d_drop(new_dentry);
rehash = new_dentry;
@@ -1647,7 +1614,7 @@ static int nfs_rename(struct inode *old_dir, struct dentry *old_dentry,
/* dentry still busy? */
goto out;
} else
- drop_nlink(new_inode);
+ nfs_drop_nlink(new_inode);
go_ahead:
/*
@@ -1681,7 +1648,6 @@ out:
/* new dentry created? */
if (dentry)
dput(dentry);
- unlock_kernel();
return error;
}
@@ -1974,8 +1940,6 @@ int nfs_permission(struct inode *inode, int mask, struct nameidata *nd)
}
force_lookup:
- lock_kernel();
-
if (!NFS_PROTO(inode)->access)
goto out_notsup;
@@ -1985,7 +1949,6 @@ force_lookup:
put_rpccred(cred);
} else
res = PTR_ERR(cred);
- unlock_kernel();
out:
dfprintk(VFS, "NFS: permission(%s/%ld), mask=0x%x, res=%d\n",
inode->i_sb->s_id, inode->i_ino, mask, res);
@@ -1994,7 +1957,6 @@ out_notsup:
res = nfs_revalidate_inode(NFS_SERVER(inode), inode);
if (res == 0)
res = generic_permission(inode, mask, NULL);
- unlock_kernel();
goto out;
}
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 43164fe8606..78460657f5c 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -128,9 +128,7 @@ nfs_file_open(struct inode *inode, struct file *filp)
return res;
nfs_inc_stats(inode, NFSIOS_VFSOPEN);
- lock_kernel();
res = nfs_open(inode, filp);
- unlock_kernel();
return res;
}
@@ -398,9 +396,7 @@ static int nfs_write_end(struct file *file, struct address_space *mapping,
zero_user_segment(page, pglen, PAGE_CACHE_SIZE);
}
- lock_kernel();
status = nfs_updatepage(file, page, offset, copied);
- unlock_kernel();
unlock_page(page);
page_cache_release(page);
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 2c23d067e2a..df23f987da6 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -370,7 +370,6 @@ nfs_setattr(struct dentry *dentry, struct iattr *attr)
if ((attr->ia_valid & ~ATTR_FILE) == 0)
return 0;
- lock_kernel();
/* Write all dirty data */
if (S_ISREG(inode->i_mode)) {
filemap_write_and_wait(inode->i_mapping);
@@ -384,11 +383,66 @@ nfs_setattr(struct dentry *dentry, struct iattr *attr)
error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr);
if (error == 0)
nfs_refresh_inode(inode, &fattr);
- unlock_kernel();
return error;
}
/**
+ * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
+ * @inode: inode of the file used
+ * @offset: file offset to start truncating
+ *
+ * This is a copy of the common vmtruncate, but with the locking
+ * corrected to take into account the fact that NFS requires
+ * inode->i_size to be updated under the inode->i_lock.
+ */
+static int nfs_vmtruncate(struct inode * inode, loff_t offset)
+{
+ if (i_size_read(inode) < offset) {
+ unsigned long limit;
+
+ limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
+ if (limit != RLIM_INFINITY && offset > limit)
+ goto out_sig;
+ if (offset > inode->i_sb->s_maxbytes)
+ goto out_big;
+ spin_lock(&inode->i_lock);
+ i_size_write(inode, offset);
+ spin_unlock(&inode->i_lock);
+ } else {
+ struct address_space *mapping = inode->i_mapping;
+
+ /*
+ * truncation of in-use swapfiles is disallowed - it would
+ * cause subsequent swapout to scribble on the now-freed
+ * blocks.
+ */
+ if (IS_SWAPFILE(inode))
+ return -ETXTBSY;
+ spin_lock(&inode->i_lock);
+ i_size_write(inode, offset);
+ spin_unlock(&inode->i_lock);
+
+ /*
+ * unmap_mapping_range is called twice, first simply for
+ * efficiency so that truncate_inode_pages does fewer
+ * single-page unmaps. However after this first call, and
+ * before truncate_inode_pages finishes, it is possible for
+ * private pages to be COWed, which remain after
+ * truncate_inode_pages finishes, hence the second
+ * unmap_mapping_range call must be made for correctness.
+ */
+ unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
+ truncate_inode_pages(mapping, offset);
+ unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
+ }
+ return 0;
+out_sig:
+ send_sig(SIGXFSZ, current, 0);
+out_big:
+ return -EFBIG;
+}
+
+/**
* nfs_setattr_update_inode - Update inode metadata after a setattr call.
* @inode: pointer to struct inode
* @attr: pointer to struct iattr
@@ -414,8 +468,7 @@ void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr)
}
if ((attr->ia_valid & ATTR_SIZE) != 0) {
nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
- inode->i_size = attr->ia_size;
- vmtruncate(inode, attr->ia_size);
+ nfs_vmtruncate(inode, attr->ia_size);
}
}
@@ -645,7 +698,6 @@ __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
inode->i_sb->s_id, (long long)NFS_FILEID(inode));
nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
- lock_kernel();
if (is_bad_inode(inode))
goto out_nowait;
if (NFS_STALE(inode))
@@ -694,7 +746,6 @@ __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
nfs_wake_up_inode(inode);
out_nowait:
- unlock_kernel();
return status;
}
@@ -829,9 +880,9 @@ static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
if (S_ISDIR(inode->i_mode))
nfsi->cache_validity |= NFS_INO_INVALID_DATA;
}
- if (inode->i_size == nfs_size_to_loff_t(fattr->pre_size) &&
+ if (i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) &&
nfsi->npages == 0)
- inode->i_size = nfs_size_to_loff_t(fattr->size);
+ i_size_write(inode, nfs_size_to_loff_t(fattr->size));
}
}
@@ -972,7 +1023,7 @@ int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fa
(fattr->valid & NFS_ATTR_WCC) == 0) {
memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime));
memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime));
- fattr->pre_size = inode->i_size;
+ fattr->pre_size = i_size_read(inode);
fattr->valid |= NFS_ATTR_WCC;
}
return nfs_post_op_update_inode(inode, fattr);
@@ -1057,7 +1108,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
/* Do we perhaps have any outstanding writes, or has
* the file grown beyond our last write? */
if (nfsi->npages == 0 || new_isize > cur_isize) {
- inode->i_size = new_isize;
+ i_size_write(inode, new_isize);
invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
}
dprintk("NFS: isize change on server for file %s/%ld\n",
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 4451287a81d..c910413eaec 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -451,9 +451,7 @@ static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
/* Save the delegation */
memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
rcu_read_unlock();
- lock_kernel();
ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
- unlock_kernel();
if (ret != 0)
goto out;
ret = -EAGAIN;
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 856a8934f61..401ef8b28f9 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -940,7 +940,6 @@ static int reclaimer(void *ptr)
allow_signal(SIGKILL);
/* Ensure exclusive access to NFSv4 state */
- lock_kernel();
down_write(&clp->cl_sem);
/* Are there any NFS mounts out there? */
if (list_empty(&clp->cl_superblocks))
@@ -1000,7 +999,6 @@ restart_loop:
nfs_delegation_reap_unclaimed(clp);
out:
up_write(&clp->cl_sem);
- unlock_kernel();
if (status == -NFS4ERR_CB_PATH_DOWN)
nfs_handle_cb_pathdown(clp);
nfs4_clear_recover_bit(clp);
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 47cf83e917b..1b94e3650f5 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -374,8 +374,6 @@ static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf)
};
int error;
- lock_kernel();
-
error = server->nfs_client->rpc_ops->statfs(server, fh, &res);
if (error < 0)
goto out_err;
@@ -407,12 +405,10 @@ static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf)
buf->f_namelen = server->namelen;
- unlock_kernel();
return 0;
out_err:
dprintk("%s: statfs error = %d\n", __func__, -error);
- unlock_kernel();
return error;
}
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index feca8c64876..3229e217c77 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -133,16 +133,21 @@ static struct nfs_page *nfs_page_find_request(struct page *page)
static void nfs_grow_file(struct page *page, unsigned int offset, unsigned int count)
{
struct inode *inode = page->mapping->host;
- loff_t end, i_size = i_size_read(inode);
- pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT;
+ loff_t end, i_size;
+ pgoff_t end_index;
+ spin_lock(&inode->i_lock);
+ i_size = i_size_read(inode);
+ end_index = (i_size - 1) >> PAGE_CACHE_SHIFT;
if (i_size > 0 && page->index < end_index)
- return;
+ goto out;
end = ((loff_t)page->index << PAGE_CACHE_SHIFT) + ((loff_t)offset+count);
if (i_size >= end)
- return;
- nfs_inc_stats(inode, NFSIOS_EXTENDWRITE);
+ goto out;
i_size_write(inode, end);
+ nfs_inc_stats(inode, NFSIOS_EXTENDWRITE);
+out:
+ spin_unlock(&inode->i_lock);
}
/* A writeback failed: mark the page as bad, and invalidate the page cache */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-18 11:15:05 +0000