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authorLinus Torvalds <torvalds@linux-foundation.org>2013-02-26 20:16:07 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-02-26 20:16:07 -0800
commitd895cb1af15c04c522a25c79cc429076987c089b (patch)
tree895dc9157e28f603d937a58be664e4e440d5530c /mm/shmem.c
parent9626357371b519f2b955fef399647181034a77fe (diff)
parentd3d009cb965eae7e002ea5badf603ea8f4c34915 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs pile (part one) from Al Viro: "Assorted stuff - cleaning namei.c up a bit, fixing ->d_name/->d_parent locking violations, etc. The most visible changes here are death of FS_REVAL_DOT (replaced with "has ->d_weak_revalidate()") and a new helper getting from struct file to inode. Some bits of preparation to xattr method interface changes. Misc patches by various people sent this cycle *and* ocfs2 fixes from several cycles ago that should've been upstream right then. PS: the next vfs pile will be xattr stuff." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (46 commits) saner proc_get_inode() calling conventions proc: avoid extra pde_put() in proc_fill_super() fs: change return values from -EACCES to -EPERM fs/exec.c: make bprm_mm_init() static ocfs2/dlm: use GFP_ATOMIC inside a spin_lock ocfs2: fix possible use-after-free with AIO ocfs2: Fix oops in ocfs2_fast_symlink_readpage() code path get_empty_filp()/alloc_file() leave both ->f_pos and ->f_version zero target: writev() on single-element vector is pointless export kernel_write(), convert open-coded instances fs: encode_fh: return FILEID_INVALID if invalid fid_type kill f_vfsmnt vfs: kill FS_REVAL_DOT by adding a d_weak_revalidate dentry op nfsd: handle vfs_getattr errors in acl protocol switch vfs_getattr() to struct path default SET_PERSONALITY() in linux/elf.h ceph: prepopulate inodes only when request is aborted d_hash_and_lookup(): export, switch open-coded instances 9p: switch v9fs_set_create_acl() to inode+fid, do it before d_instantiate() 9p: split dropping the acls from v9fs_set_create_acl() ...
Diffstat (limited to 'mm/shmem.c')
-rw-r--r--mm/shmem.c52
1 files changed, 31 insertions, 21 deletions
diff --git a/mm/shmem.c b/mm/shmem.c
index 39de1d6a077..ed2befb4952 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1294,7 +1294,7 @@ unlock:
static int shmem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
- struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(vma->vm_file);
int error;
int ret = VM_FAULT_LOCKED;
@@ -1312,14 +1312,14 @@ static int shmem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
#ifdef CONFIG_NUMA
static int shmem_set_policy(struct vm_area_struct *vma, struct mempolicy *mpol)
{
- struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(vma->vm_file);
return mpol_set_shared_policy(&SHMEM_I(inode)->policy, vma, mpol);
}
static struct mempolicy *shmem_get_policy(struct vm_area_struct *vma,
unsigned long addr)
{
- struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(vma->vm_file);
pgoff_t index;
index = ((addr - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
@@ -1329,7 +1329,7 @@ static struct mempolicy *shmem_get_policy(struct vm_area_struct *vma,
int shmem_lock(struct file *file, int lock, struct user_struct *user)
{
- struct inode *inode = file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(file);
struct shmem_inode_info *info = SHMEM_I(inode);
int retval = -ENOMEM;
@@ -1464,7 +1464,7 @@ shmem_write_end(struct file *file, struct address_space *mapping,
static void do_shmem_file_read(struct file *filp, loff_t *ppos, read_descriptor_t *desc, read_actor_t actor)
{
- struct inode *inode = filp->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(filp);
struct address_space *mapping = inode->i_mapping;
pgoff_t index;
unsigned long offset;
@@ -1807,7 +1807,7 @@ static loff_t shmem_file_llseek(struct file *file, loff_t offset, int whence)
static long shmem_fallocate(struct file *file, int mode, loff_t offset,
loff_t len)
{
- struct inode *inode = file->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(file);
struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb);
struct shmem_falloc shmem_falloc;
pgoff_t start, index, end;
@@ -2350,7 +2350,7 @@ static int shmem_encode_fh(struct inode *inode, __u32 *fh, int *len,
{
if (*len < 3) {
*len = 3;
- return 255;
+ return FILEID_INVALID;
}
if (inode_unhashed(inode)) {
@@ -2879,6 +2879,16 @@ EXPORT_SYMBOL_GPL(shmem_truncate_range);
/* common code */
+static char *shmem_dname(struct dentry *dentry, char *buffer, int buflen)
+{
+ return dynamic_dname(dentry, buffer, buflen, "/%s (deleted)",
+ dentry->d_name.name);
+}
+
+static struct dentry_operations anon_ops = {
+ .d_dname = shmem_dname
+};
+
/**
* shmem_file_setup - get an unlinked file living in tmpfs
* @name: name for dentry (to be seen in /proc/<pid>/maps
@@ -2887,15 +2897,14 @@ EXPORT_SYMBOL_GPL(shmem_truncate_range);
*/
struct file *shmem_file_setup(const char *name, loff_t size, unsigned long flags)
{
- int error;
- struct file *file;
+ struct file *res;
struct inode *inode;
struct path path;
- struct dentry *root;
+ struct super_block *sb;
struct qstr this;
if (IS_ERR(shm_mnt))
- return (void *)shm_mnt;
+ return ERR_CAST(shm_mnt);
if (size < 0 || size > MAX_LFS_FILESIZE)
return ERR_PTR(-EINVAL);
@@ -2903,18 +2912,19 @@ struct file *shmem_file_setup(const char *name, loff_t size, unsigned long flags
if (shmem_acct_size(flags, size))
return ERR_PTR(-ENOMEM);
- error = -ENOMEM;
+ res = ERR_PTR(-ENOMEM);
this.name = name;
this.len = strlen(name);
this.hash = 0; /* will go */
- root = shm_mnt->mnt_root;
- path.dentry = d_alloc(root, &this);
+ sb = shm_mnt->mnt_sb;
+ path.dentry = d_alloc_pseudo(sb, &this);
if (!path.dentry)
goto put_memory;
+ d_set_d_op(path.dentry, &anon_ops);
path.mnt = mntget(shm_mnt);
- error = -ENOSPC;
- inode = shmem_get_inode(root->d_sb, NULL, S_IFREG | S_IRWXUGO, 0, flags);
+ res = ERR_PTR(-ENOSPC);
+ inode = shmem_get_inode(sb, NULL, S_IFREG | S_IRWXUGO, 0, flags);
if (!inode)
goto put_dentry;
@@ -2923,23 +2933,23 @@ struct file *shmem_file_setup(const char *name, loff_t size, unsigned long flags
clear_nlink(inode); /* It is unlinked */
#ifndef CONFIG_MMU
error = ramfs_nommu_expand_for_mapping(inode, size);
+ res = ERR_PTR(error);
if (error)
goto put_dentry;
#endif
- error = -ENFILE;
- file = alloc_file(&path, FMODE_WRITE | FMODE_READ,
+ res = alloc_file(&path, FMODE_WRITE | FMODE_READ,
&shmem_file_operations);
- if (!file)
+ if (IS_ERR(res))
goto put_dentry;
- return file;
+ return res;
put_dentry:
path_put(&path);
put_memory:
shmem_unacct_size(flags, size);
- return ERR_PTR(error);
+ return res;
}
EXPORT_SYMBOL_GPL(shmem_file_setup);