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authorAl Viro <viro@zeniv.linux.org.uk>2013-05-15 17:52:59 (GMT)
committerPawel Osmialowski <p.osmialowsk@mcdsrvbld02.digital.local>2015-03-27 13:37:33 (GMT)
commitce306d01f07780b85ae43bfe2242d35f6e4ccf94 (patch)
treee2561b95b0853eee9d3306c2aef1ad11ce927c69
parentfaadf151bfee5e52c2333ddf6c7805143a52a339 (diff)
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introduce iterate_dir() and dir_context
iterate_dir(): new helper, replacing vfs_readdir(). struct dir_context: contains the readdir callback (and will get more stuff in it), embedded into whatever data that callback wants to deal with; eventually, we'll be passing it to ->readdir() replacement instead of (data,filldir) pair. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--Documentation/filesystems/porting3
-rw-r--r--arch/alpha/kernel/osf_sys.c4
-rw-r--r--arch/parisc/hpux/fs.c4
-rw-r--r--fs/compat.c12
-rw-r--r--fs/ecryptfs/file.c4
-rw-r--r--fs/exportfs/expfs.c4
-rw-r--r--fs/nfsd/nfs4recover.c13
-rw-r--r--fs/nfsd/vfs.c4
-rw-r--r--fs/readdir.c21
-rw-r--r--include/linux/fs.h4
10 files changed, 53 insertions, 20 deletions
diff --git a/Documentation/filesystems/porting b/Documentation/filesystems/porting
index 4db22f6..85a4a03 100644
--- a/Documentation/filesystems/porting
+++ b/Documentation/filesystems/porting
@@ -445,3 +445,6 @@ object doesn't exist. It's remote/distributed ones that might care...
[mandatory]
FS_REVAL_DOT is gone; if you used to have it, add ->d_weak_revalidate()
in your dentry operations instead.
+--
+[mandatory]
+ vfs_readdir() is gone; switch to iterate_dir() instead
diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c
index b9e37ad..ac19c72 100644
--- a/arch/alpha/kernel/osf_sys.c
+++ b/arch/alpha/kernel/osf_sys.c
@@ -96,6 +96,7 @@ struct osf_dirent {
};
struct osf_dirent_callback {
+ struct dir_context ctx;
struct osf_dirent __user *dirent;
long __user *basep;
unsigned int count;
@@ -155,8 +156,9 @@ SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd,
buf.basep = basep;
buf.count = count;
buf.error = 0;
+ buf.ctx.actor = osf_filldir;
- error = vfs_readdir(arg.file, osf_filldir, &buf);
+ error = iterate_dir(arg.file, &buf.ctx);
if (error >= 0)
error = buf.error;
if (count != buf.count)
diff --git a/arch/parisc/hpux/fs.c b/arch/parisc/hpux/fs.c
index 838b479..fc2cbee 100644
--- a/arch/parisc/hpux/fs.c
+++ b/arch/parisc/hpux/fs.c
@@ -60,6 +60,7 @@ struct hpux_dirent {
};
struct getdents_callback {
+ struct dir_context ctx;
struct hpux_dirent __user *current_dir;
struct hpux_dirent __user *previous;
int count;
@@ -121,8 +122,9 @@ int hpux_getdents(unsigned int fd, struct hpux_dirent __user *dirent, unsigned i
buf.previous = NULL;
buf.count = count;
buf.error = 0;
+ buf.ctx.actor = filldir;
- error = vfs_readdir(arg.file, filldir, &buf);
+ error = iterate_dir(arg.file, &buf.ctx);
if (error >= 0)
error = buf.error;
lastdirent = buf.previous;
diff --git a/fs/compat.c b/fs/compat.c
index fc3b55d..2279b59 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -832,6 +832,7 @@ struct compat_old_linux_dirent {
};
struct compat_readdir_callback {
+ struct dir_context ctx;
struct compat_old_linux_dirent __user *dirent;
int result;
};
@@ -880,8 +881,9 @@ asmlinkage long compat_sys_old_readdir(unsigned int fd,
buf.result = 0;
buf.dirent = dirent;
+ buf.ctx.actor = compat_fillonedir;
- error = vfs_readdir(f.file, compat_fillonedir, &buf);
+ error = iterate_dir(f.file, &buf.ctx);
if (buf.result)
error = buf.result;
@@ -897,6 +899,7 @@ struct compat_linux_dirent {
};
struct compat_getdents_callback {
+ struct dir_context ctx;
struct compat_linux_dirent __user *current_dir;
struct compat_linux_dirent __user *previous;
int count;
@@ -965,8 +968,9 @@ asmlinkage long compat_sys_getdents(unsigned int fd,
buf.previous = NULL;
buf.count = count;
buf.error = 0;
+ buf.ctx.actor = compat_filldir;
- error = vfs_readdir(f.file, compat_filldir, &buf);
+ error = iterate_dir(f.file, &buf.ctx);
if (error >= 0)
error = buf.error;
lastdirent = buf.previous;
@@ -983,6 +987,7 @@ asmlinkage long compat_sys_getdents(unsigned int fd,
#ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
struct compat_getdents_callback64 {
+ struct dir_context ctx;
struct linux_dirent64 __user *current_dir;
struct linux_dirent64 __user *previous;
int count;
@@ -1050,8 +1055,9 @@ asmlinkage long compat_sys_getdents64(unsigned int fd,
buf.previous = NULL;
buf.count = count;
buf.error = 0;
+ buf.ctx.actor = compat_filldir64;
- error = vfs_readdir(f.file, compat_filldir64, &buf);
+ error = iterate_dir(f.file, &buf.ctx);
if (error >= 0)
error = buf.error;
lastdirent = buf.previous;
diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index a7abbea..041379a 100644
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -68,6 +68,7 @@ static ssize_t ecryptfs_read_update_atime(struct kiocb *iocb,
}
struct ecryptfs_getdents_callback {
+ struct dir_context ctx;
void *dirent;
struct dentry *dentry;
filldir_t filldir;
@@ -126,7 +127,8 @@ static int ecryptfs_readdir(struct file *file, void *dirent, filldir_t filldir)
buf.filldir = filldir;
buf.filldir_called = 0;
buf.entries_written = 0;
- rc = vfs_readdir(lower_file, ecryptfs_filldir, (void *)&buf);
+ buf.ctx.actor = ecryptfs_filldir;
+ rc = iterate_dir(lower_file, &buf.ctx);
file->f_pos = lower_file->f_pos;
if (rc < 0)
goto out;
diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index 262fc99..7cb1904 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -212,6 +212,7 @@ reconnect_path(struct vfsmount *mnt, struct dentry *target_dir, char *nbuf)
}
struct getdents_callback {
+ struct dir_context ctx;
char *name; /* name that was found. It already points to a
buffer NAME_MAX+1 is size */
unsigned long ino; /* the inum we are looking for */
@@ -278,10 +279,11 @@ static int get_name(const struct path *path, char *name, struct dentry *child)
buffer.ino = child->d_inode->i_ino;
buffer.found = 0;
buffer.sequence = 0;
+ buffer.ctx.actor = filldir_one;
while (1) {
int old_seq = buffer.sequence;
- error = vfs_readdir(file, filldir_one, &buffer);
+ error = iterate_dir(file, &buffer.ctx);
if (buffer.found) {
error = 0;
break;
diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c
index 4e9a21d..4f8cc6b 100644
--- a/fs/nfsd/nfs4recover.c
+++ b/fs/nfsd/nfs4recover.c
@@ -263,7 +263,10 @@ nfsd4_list_rec_dir(recdir_func *f, struct nfsd_net *nn)
{
const struct cred *original_cred;
struct dentry *dir = nn->rec_file->f_path.dentry;
- LIST_HEAD(names);
+ struct {
+ struct dir_context ctx;
+ struct list_head names;
+ } ctx;
int status;
status = nfs4_save_creds(&original_cred);
@@ -276,11 +279,13 @@ nfsd4_list_rec_dir(recdir_func *f, struct nfsd_net *nn)
return status;
}
- status = vfs_readdir(nn->rec_file, nfsd4_build_namelist, &names);
+ INIT_LIST_HEAD(&ctx.names);
+ ctx.ctx.actor = nfsd4_build_namelist;
+ status = iterate_dir(nn->rec_file, &ctx.ctx);
mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_PARENT);
- while (!list_empty(&names)) {
+ while (!list_empty(&ctx.names)) {
struct name_list *entry;
- entry = list_entry(names.next, struct name_list, list);
+ entry = list_entry(ctx.names.next, struct name_list, list);
if (!status) {
struct dentry *dentry;
dentry = lookup_one_len(entry->name, dir, HEXDIR_LEN-1);
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index d9b298c..68d57c5 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1947,6 +1947,7 @@ struct buffered_dirent {
};
struct readdir_data {
+ struct dir_context ctx;
char *dirent;
size_t used;
int full;
@@ -1984,6 +1985,7 @@ static __be32 nfsd_buffered_readdir(struct file *file, filldir_t func,
int size;
loff_t offset;
+ buf.ctx.actor = nfsd_buffered_filldir;
buf.dirent = (void *)__get_free_page(GFP_KERNEL);
if (!buf.dirent)
return nfserrno(-ENOMEM);
@@ -1998,7 +2000,7 @@ static __be32 nfsd_buffered_readdir(struct file *file, filldir_t func,
buf.used = 0;
buf.full = 0;
- host_err = vfs_readdir(file, nfsd_buffered_filldir, &buf);
+ host_err = iterate_dir(file, &buf.ctx);
if (buf.full)
host_err = 0;
diff --git a/fs/readdir.c b/fs/readdir.c
index fee38e0..5b620a2 100644
--- a/fs/readdir.c
+++ b/fs/readdir.c
@@ -20,7 +20,7 @@
#include <asm/uaccess.h>
-int vfs_readdir(struct file *file, filldir_t filler, void *buf)
+int iterate_dir(struct file *file, struct dir_context *ctx)
{
struct inode *inode = file_inode(file);
int res = -ENOTDIR;
@@ -37,15 +37,14 @@ int vfs_readdir(struct file *file, filldir_t filler, void *buf)
res = -ENOENT;
if (!IS_DEADDIR(inode)) {
- res = file->f_op->readdir(file, buf, filler);
+ res = file->f_op->readdir(file, ctx, ctx->actor);
file_accessed(file);
}
mutex_unlock(&inode->i_mutex);
out:
return res;
}
-
-EXPORT_SYMBOL(vfs_readdir);
+EXPORT_SYMBOL(iterate_dir);
/*
* Traditional linux readdir() handling..
@@ -66,6 +65,7 @@ struct old_linux_dirent {
};
struct readdir_callback {
+ struct dir_context ctx;
struct old_linux_dirent __user * dirent;
int result;
};
@@ -73,7 +73,7 @@ struct readdir_callback {
static int fillonedir(void * __buf, const char * name, int namlen, loff_t offset,
u64 ino, unsigned int d_type)
{
- struct readdir_callback * buf = (struct readdir_callback *) __buf;
+ struct readdir_callback *buf = (struct readdir_callback *) __buf;
struct old_linux_dirent __user * dirent;
unsigned long d_ino;
@@ -112,10 +112,11 @@ SYSCALL_DEFINE3(old_readdir, unsigned int, fd,
if (!f.file)
return -EBADF;
+ buf.ctx.actor = fillonedir;
buf.result = 0;
buf.dirent = dirent;
- error = vfs_readdir(f.file, fillonedir, &buf);
+ error = iterate_dir(f.file, &buf.ctx);
if (buf.result)
error = buf.result;
@@ -137,6 +138,7 @@ struct linux_dirent {
};
struct getdents_callback {
+ struct dir_context ctx;
struct linux_dirent __user * current_dir;
struct linux_dirent __user * previous;
int count;
@@ -205,8 +207,9 @@ SYSCALL_DEFINE3(getdents, unsigned int, fd,
buf.previous = NULL;
buf.count = count;
buf.error = 0;
+ buf.ctx.actor = filldir;
- error = vfs_readdir(f.file, filldir, &buf);
+ error = iterate_dir(f.file, &buf.ctx);
if (error >= 0)
error = buf.error;
lastdirent = buf.previous;
@@ -221,6 +224,7 @@ SYSCALL_DEFINE3(getdents, unsigned int, fd,
}
struct getdents_callback64 {
+ struct dir_context ctx;
struct linux_dirent64 __user * current_dir;
struct linux_dirent64 __user * previous;
int count;
@@ -285,8 +289,9 @@ SYSCALL_DEFINE3(getdents64, unsigned int, fd,
buf.previous = NULL;
buf.count = count;
buf.error = 0;
+ buf.ctx.actor = filldir64;
- error = vfs_readdir(f.file, filldir64, &buf);
+ error = iterate_dir(f.file, &buf.ctx);
if (error >= 0)
error = buf.error;
lastdirent = buf.previous;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 2ddb98a..00bb907 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1531,6 +1531,9 @@ int fiemap_check_flags(struct fiemap_extent_info *fieinfo, u32 fs_flags);
* to have different dirent layouts depending on the binary type.
*/
typedef int (*filldir_t)(void *, const char *, int, loff_t, u64, unsigned);
+struct dir_context {
+ filldir_t actor;
+};
struct block_device_operations;
/* These macros are for out of kernel modules to test that
@@ -2531,6 +2534,7 @@ loff_t inode_get_bytes(struct inode *inode);
void inode_set_bytes(struct inode *inode, loff_t bytes);
extern int vfs_readdir(struct file *, filldir_t, void *);
+extern int iterate_dir(struct file *, struct dir_context *);
extern int vfs_stat(const char __user *, struct kstat *);
extern int vfs_lstat(const char __user *, struct kstat *);