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authorAl Viro <viro@zeniv.linux.org.uk>2013-05-16 00:23:06 (GMT)
committerPawel Osmialowski <p.osmialowsk@mcdsrvbld02.digital.local>2015-03-27 13:37:34 (GMT)
commit07e6c72da6555c69dc5e0ac386687cd22c4b62b4 (patch)
treeadbbecfbcb40c03343f61fd259d61219a64df762
parent917b3407465c2af8530879c5e5f14baf3a27ceab (diff)
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switch dcache_readdir() users to ->iterate()
new helpers - dir_emit_dot(file, ctx, dentry), dir_emit_dotdot(file, ctx), dir_emit_dots(file, ctx). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--arch/powerpc/platforms/cell/spufs/inode.c2
-rw-r--r--fs/autofs4/root.c4
-rw-r--r--fs/libfs.c80
-rw-r--r--include/linux/fs.h39
4 files changed, 65 insertions, 60 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/inode.c b/arch/powerpc/platforms/cell/spufs/inode.c
index 35f77a4..f390042 100644
--- a/arch/powerpc/platforms/cell/spufs/inode.c
+++ b/arch/powerpc/platforms/cell/spufs/inode.c
@@ -238,7 +238,7 @@ const struct file_operations spufs_context_fops = {
.release = spufs_dir_close,
.llseek = dcache_dir_lseek,
.read = generic_read_dir,
- .readdir = dcache_readdir,
+ .iterate = dcache_readdir,
.fsync = noop_fsync,
};
EXPORT_SYMBOL_GPL(spufs_context_fops);
diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index a0c8a1d..92ef341 100644
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -41,7 +41,7 @@ const struct file_operations autofs4_root_operations = {
.open = dcache_dir_open,
.release = dcache_dir_close,
.read = generic_read_dir,
- .readdir = dcache_readdir,
+ .iterate = dcache_readdir,
.llseek = dcache_dir_lseek,
.unlocked_ioctl = autofs4_root_ioctl,
#ifdef CONFIG_COMPAT
@@ -53,7 +53,7 @@ const struct file_operations autofs4_dir_operations = {
.open = autofs4_dir_open,
.release = dcache_dir_close,
.read = generic_read_dir,
- .readdir = dcache_readdir,
+ .iterate = dcache_readdir,
.llseek = dcache_dir_lseek,
};
diff --git a/fs/libfs.c b/fs/libfs.c
index 916da8c..c3a0837 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -135,60 +135,40 @@ static inline unsigned char dt_type(struct inode *inode)
* both impossible due to the lock on directory.
*/
-int dcache_readdir(struct file * filp, void * dirent, filldir_t filldir)
+int dcache_readdir(struct file *file, struct dir_context *ctx)
{
- struct dentry *dentry = filp->f_path.dentry;
- struct dentry *cursor = filp->private_data;
+ struct dentry *dentry = file->f_path.dentry;
+ struct dentry *cursor = file->private_data;
struct list_head *p, *q = &cursor->d_u.d_child;
- ino_t ino;
- int i = filp->f_pos;
- switch (i) {
- case 0:
- ino = dentry->d_inode->i_ino;
- if (filldir(dirent, ".", 1, i, ino, DT_DIR) < 0)
- break;
- filp->f_pos++;
- i++;
- /* fallthrough */
- case 1:
- ino = parent_ino(dentry);
- if (filldir(dirent, "..", 2, i, ino, DT_DIR) < 0)
- break;
- filp->f_pos++;
- i++;
- /* fallthrough */
- default:
- spin_lock(&dentry->d_lock);
- if (filp->f_pos == 2)
- list_move(q, &dentry->d_subdirs);
-
- for (p=q->next; p != &dentry->d_subdirs; p=p->next) {
- struct dentry *next;
- next = list_entry(p, struct dentry, d_u.d_child);
- spin_lock_nested(&next->d_lock, DENTRY_D_LOCK_NESTED);
- if (!simple_positive(next)) {
- spin_unlock(&next->d_lock);
- continue;
- }
+ if (!dir_emit_dots(file, ctx))
+ return 0;
+ spin_lock(&dentry->d_lock);
+ if (ctx->pos == 2)
+ list_move(q, &dentry->d_subdirs);
+
+ for (p = q->next; p != &dentry->d_subdirs; p = p->next) {
+ struct dentry *next = list_entry(p, struct dentry, d_u.d_child);
+ spin_lock_nested(&next->d_lock, DENTRY_D_LOCK_NESTED);
+ if (!simple_positive(next)) {
+ spin_unlock(&next->d_lock);
+ continue;
+ }
- spin_unlock(&next->d_lock);
- spin_unlock(&dentry->d_lock);
- if (filldir(dirent, next->d_name.name,
- next->d_name.len, filp->f_pos,
- next->d_inode->i_ino,
- dt_type(next->d_inode)) < 0)
- return 0;
- spin_lock(&dentry->d_lock);
- spin_lock_nested(&next->d_lock, DENTRY_D_LOCK_NESTED);
- /* next is still alive */
- list_move(q, p);
- spin_unlock(&next->d_lock);
- p = q;
- filp->f_pos++;
- }
- spin_unlock(&dentry->d_lock);
+ spin_unlock(&next->d_lock);
+ spin_unlock(&dentry->d_lock);
+ if (!dir_emit(ctx, next->d_name.name, next->d_name.len,
+ next->d_inode->i_ino, dt_type(next->d_inode)))
+ return 0;
+ spin_lock(&dentry->d_lock);
+ spin_lock_nested(&next->d_lock, DENTRY_D_LOCK_NESTED);
+ /* next is still alive */
+ list_move(q, p);
+ spin_unlock(&next->d_lock);
+ p = q;
+ ctx->pos++;
}
+ spin_unlock(&dentry->d_lock);
return 0;
}
@@ -202,7 +182,7 @@ const struct file_operations simple_dir_operations = {
.release = dcache_dir_close,
.llseek = dcache_dir_lseek,
.read = generic_read_dir,
- .readdir = dcache_readdir,
+ .iterate = dcache_readdir,
.fsync = noop_fsync,
};
diff --git a/include/linux/fs.h b/include/linux/fs.h
index d6a1444..59d68c3 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1536,12 +1536,6 @@ struct dir_context {
loff_t pos;
};
-static inline bool dir_emit(struct dir_context *ctx,
- const char *name, int namelen,
- u64 ino, unsigned type)
-{
- return ctx->actor(ctx, name, namelen, ctx->pos, ino, type) == 0;
-}
struct block_device_operations;
/* These macros are for out of kernel modules to test that
@@ -2574,7 +2568,7 @@ extern void iterate_supers_type(struct file_system_type *,
extern int dcache_dir_open(struct inode *, struct file *);
extern int dcache_dir_close(struct inode *, struct file *);
extern loff_t dcache_dir_lseek(struct file *, loff_t, int);
-extern int dcache_readdir(struct file *, void *, filldir_t);
+extern int dcache_readdir(struct file *, struct dir_context *);
extern int simple_setattr(struct dentry *, struct iattr *);
extern int simple_getattr(struct vfsmount *, struct dentry *, struct kstat *);
extern int simple_statfs(struct dentry *, struct kstatfs *);
@@ -2738,4 +2732,35 @@ static inline void inode_has_no_xattr(struct inode *inode)
inode->i_flags |= S_NOSEC;
}
+static inline bool dir_emit(struct dir_context *ctx,
+ const char *name, int namelen,
+ u64 ino, unsigned type)
+{
+ return ctx->actor(ctx, name, namelen, ctx->pos, ino, type) == 0;
+}
+static inline bool dir_emit_dot(struct file *file, struct dir_context *ctx)
+{
+ return ctx->actor(ctx, ".", 1, ctx->pos,
+ file->f_path.dentry->d_inode->i_ino, DT_DIR) == 0;
+}
+static inline bool dir_emit_dotdot(struct file *file, struct dir_context *ctx)
+{
+ return ctx->actor(ctx, "..", 2, ctx->pos,
+ parent_ino(file->f_path.dentry), DT_DIR) == 0;
+}
+static inline bool dir_emit_dots(struct file *file, struct dir_context *ctx)
+{
+ if (ctx->pos == 0) {
+ if (!dir_emit_dot(file, ctx))
+ return false;
+ ctx->pos = 1;
+ }
+ if (ctx->pos == 1) {
+ if (!dir_emit_dotdot(file, ctx))
+ return false;
+ ctx->pos = 2;
+ }
+ return true;
+}
+
#endif /* _LINUX_FS_H */