summaryrefslogtreecommitdiff
path: root/fs
diff options
context:
space:
mode:
Diffstat (limited to 'fs')
-rw-r--r--fs/ceph/dir.c51
-rw-r--r--fs/ceph/export.c26
-rw-r--r--fs/ceph/file.c4
-rw-r--r--fs/ceph/inode.c22
-rw-r--r--fs/ceph/super.c2
-rw-r--r--fs/ceph/super.h10
-rw-r--r--fs/namei.c147
-rw-r--r--fs/ncpfs/file.c2
-rw-r--r--fs/orangefs/devorangefs-req.c13
9 files changed, 74 insertions, 203 deletions
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 78180d151730..c23eb0e9348c 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -32,40 +32,19 @@ const struct dentry_operations ceph_dentry_ops;
/*
* Initialize ceph dentry state.
*/
-int ceph_init_dentry(struct dentry *dentry)
+static int ceph_d_init(struct dentry *dentry)
{
struct ceph_dentry_info *di;
- if (dentry->d_fsdata)
- return 0;
-
di = kmem_cache_zalloc(ceph_dentry_cachep, GFP_KERNEL);
if (!di)
return -ENOMEM; /* oh well */
- spin_lock(&dentry->d_lock);
- if (dentry->d_fsdata) {
- /* lost a race */
- kmem_cache_free(ceph_dentry_cachep, di);
- goto out_unlock;
- }
-
- if (ceph_snap(d_inode(dentry->d_parent)) == CEPH_NOSNAP)
- d_set_d_op(dentry, &ceph_dentry_ops);
- else if (ceph_snap(d_inode(dentry->d_parent)) == CEPH_SNAPDIR)
- d_set_d_op(dentry, &ceph_snapdir_dentry_ops);
- else
- d_set_d_op(dentry, &ceph_snap_dentry_ops);
-
di->dentry = dentry;
di->lease_session = NULL;
di->time = jiffies;
- /* avoid reordering d_fsdata setup so that the check above is safe */
- smp_mb();
dentry->d_fsdata = di;
ceph_dentry_lru_add(dentry);
-out_unlock:
- spin_unlock(&dentry->d_lock);
return 0;
}
@@ -737,10 +716,6 @@ static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry,
if (dentry->d_name.len > NAME_MAX)
return ERR_PTR(-ENAMETOOLONG);
- err = ceph_init_dentry(dentry);
- if (err < 0)
- return ERR_PTR(err);
-
/* can we conclude ENOENT locally? */
if (d_really_is_negative(dentry)) {
struct ceph_inode_info *ci = ceph_inode(dir);
@@ -1319,16 +1294,6 @@ static void ceph_d_release(struct dentry *dentry)
kmem_cache_free(ceph_dentry_cachep, di);
}
-static int ceph_snapdir_d_revalidate(struct dentry *dentry,
- unsigned int flags)
-{
- /*
- * Eventually, we'll want to revalidate snapped metadata
- * too... probably...
- */
- return 1;
-}
-
/*
* When the VFS prunes a dentry from the cache, we need to clear the
* complete flag on the parent directory.
@@ -1347,6 +1312,9 @@ static void ceph_d_prune(struct dentry *dentry)
if (d_unhashed(dentry))
return;
+ if (ceph_snap(d_inode(dentry->d_parent)) == CEPH_SNAPDIR)
+ return;
+
/*
* we hold d_lock, so d_parent is stable, and d_fsdata is never
* cleared until d_release
@@ -1517,14 +1485,5 @@ const struct dentry_operations ceph_dentry_ops = {
.d_revalidate = ceph_d_revalidate,
.d_release = ceph_d_release,
.d_prune = ceph_d_prune,
-};
-
-const struct dentry_operations ceph_snapdir_dentry_ops = {
- .d_revalidate = ceph_snapdir_d_revalidate,
- .d_release = ceph_d_release,
-};
-
-const struct dentry_operations ceph_snap_dentry_ops = {
- .d_release = ceph_d_release,
- .d_prune = ceph_d_prune,
+ .d_init = ceph_d_init,
};
diff --git a/fs/ceph/export.c b/fs/ceph/export.c
index 1780218a48f0..180bbef760f2 100644
--- a/fs/ceph/export.c
+++ b/fs/ceph/export.c
@@ -62,7 +62,6 @@ static struct dentry *__fh_to_dentry(struct super_block *sb, u64 ino)
{
struct ceph_mds_client *mdsc = ceph_sb_to_client(sb)->mdsc;
struct inode *inode;
- struct dentry *dentry;
struct ceph_vino vino;
int err;
@@ -94,16 +93,7 @@ static struct dentry *__fh_to_dentry(struct super_block *sb, u64 ino)
return ERR_PTR(-ESTALE);
}
- dentry = d_obtain_alias(inode);
- if (IS_ERR(dentry))
- return dentry;
- err = ceph_init_dentry(dentry);
- if (err < 0) {
- dput(dentry);
- return ERR_PTR(err);
- }
- dout("__fh_to_dentry %llx %p dentry %p\n", ino, inode, dentry);
- return dentry;
+ return d_obtain_alias(inode);
}
/*
@@ -131,7 +121,6 @@ static struct dentry *__get_parent(struct super_block *sb,
struct ceph_mds_client *mdsc = ceph_sb_to_client(sb)->mdsc;
struct ceph_mds_request *req;
struct inode *inode;
- struct dentry *dentry;
int mask;
int err;
@@ -164,18 +153,7 @@ static struct dentry *__get_parent(struct super_block *sb,
if (!inode)
return ERR_PTR(-ENOENT);
- dentry = d_obtain_alias(inode);
- if (IS_ERR(dentry))
- return dentry;
- err = ceph_init_dentry(dentry);
- if (err < 0) {
- dput(dentry);
- return ERR_PTR(err);
- }
- dout("__get_parent ino %llx parent %p ino %llx.%llx\n",
- child ? ceph_ino(d_inode(child)) : ino,
- dentry, ceph_vinop(inode));
- return dentry;
+ return d_obtain_alias(inode);
}
static struct dentry *ceph_get_parent(struct dentry *child)
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index f995e3528a33..159fc8f1a6a0 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -351,10 +351,6 @@ int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
if (dentry->d_name.len > NAME_MAX)
return -ENAMETOOLONG;
- err = ceph_init_dentry(dentry);
- if (err < 0)
- return err;
-
if (flags & O_CREAT) {
err = ceph_pre_init_acls(dir, &mode, &acls);
if (err < 0)
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index ef4d04647325..284f0d807151 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -1023,16 +1023,17 @@ static void update_dentry_lease(struct dentry *dentry,
long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000;
struct inode *dir;
- /* only track leases on regular dentries */
- if (dentry->d_op != &ceph_dentry_ops)
- return;
-
spin_lock(&dentry->d_lock);
dout("update_dentry_lease %p duration %lu ms ttl %lu\n",
dentry, duration, ttl);
/* make lease_rdcache_gen match directory */
dir = d_inode(dentry->d_parent);
+
+ /* only track leases on regular dentries */
+ if (ceph_snap(dir) != CEPH_NOSNAP)
+ goto out_unlock;
+
di->lease_shared_gen = ceph_inode(dir)->i_shared_gen;
if (duration == 0)
@@ -1202,12 +1203,7 @@ retry_lookup:
err = -ENOMEM;
goto done;
}
- err = ceph_init_dentry(dn);
- if (err < 0) {
- dput(dn);
- dput(parent);
- goto done;
- }
+ err = 0;
} else if (d_really_is_positive(dn) &&
(ceph_ino(d_inode(dn)) != vino.ino ||
ceph_snap(d_inode(dn)) != vino.snap)) {
@@ -1561,12 +1557,6 @@ retry_lookup:
err = -ENOMEM;
goto out;
}
- ret = ceph_init_dentry(dn);
- if (ret < 0) {
- dput(dn);
- err = ret;
- goto out;
- }
} else if (d_really_is_positive(dn) &&
(ceph_ino(d_inode(dn)) != vino.ino ||
ceph_snap(d_inode(dn)) != vino.snap)) {
diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index b382e5910eea..f2f76696ddca 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -795,7 +795,6 @@ static struct dentry *open_root_dentry(struct ceph_fs_client *fsc,
root = ERR_PTR(-ENOMEM);
goto out;
}
- ceph_init_dentry(root);
dout("open_root_inode success, root dentry is %p\n", root);
} else {
root = ERR_PTR(err);
@@ -879,6 +878,7 @@ static int ceph_set_super(struct super_block *s, void *data)
fsc->sb = s;
s->s_op = &ceph_super_ops;
+ s->s_d_op = &ceph_dentry_ops;
s->s_export_op = &ceph_export_ops;
s->s_time_gran = 1000; /* 1000 ns == 1 us */
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index 3e3fa9163059..931687f71a7c 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -934,8 +934,7 @@ extern const struct file_operations ceph_dir_fops;
extern const struct file_operations ceph_snapdir_fops;
extern const struct inode_operations ceph_dir_iops;
extern const struct inode_operations ceph_snapdir_iops;
-extern const struct dentry_operations ceph_dentry_ops, ceph_snap_dentry_ops,
- ceph_snapdir_dentry_ops;
+extern const struct dentry_operations ceph_dentry_ops;
extern loff_t ceph_make_fpos(unsigned high, unsigned off, bool hash_order);
extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry);
@@ -951,13 +950,6 @@ extern void ceph_invalidate_dentry_lease(struct dentry *dentry);
extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn);
extern void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl);
-/*
- * our d_ops vary depending on whether the inode is live,
- * snapshotted (read-only), or a virtual ".snap" directory.
- */
-int ceph_init_dentry(struct dentry *dentry);
-
-
/* ioctl.c */
extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
diff --git a/fs/namei.c b/fs/namei.c
index 5b4eed221530..092ac5667ec7 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1725,30 +1725,35 @@ static int pick_link(struct nameidata *nd, struct path *link,
return 1;
}
+enum {WALK_FOLLOW = 1, WALK_MORE = 2};
+
/*
* Do we need to follow links? We _really_ want to be able
* to do this check without having to look at inode->i_op,
* so we keep a cache of "no, this doesn't need follow_link"
* for the common case.
*/
-static inline int should_follow_link(struct nameidata *nd, struct path *link,
- int follow,
- struct inode *inode, unsigned seq)
+static inline int step_into(struct nameidata *nd, struct path *path,
+ int flags, struct inode *inode, unsigned seq)
{
- if (likely(!d_is_symlink(link->dentry)))
- return 0;
- if (!follow)
+ if (!(flags & WALK_MORE) && nd->depth)
+ put_link(nd);
+ if (likely(!d_is_symlink(path->dentry)) ||
+ !(flags & WALK_FOLLOW || nd->flags & LOOKUP_FOLLOW)) {
+ /* not a symlink or should not follow */
+ path_to_nameidata(path, nd);
+ nd->inode = inode;
+ nd->seq = seq;
return 0;
+ }
/* make sure that d_is_symlink above matches inode */
if (nd->flags & LOOKUP_RCU) {
- if (read_seqcount_retry(&link->dentry->d_seq, seq))
+ if (read_seqcount_retry(&path->dentry->d_seq, seq))
return -ECHILD;
}
- return pick_link(nd, link, inode, seq);
+ return pick_link(nd, path, inode, seq);
}
-enum {WALK_GET = 1, WALK_PUT = 2};
-
static int walk_component(struct nameidata *nd, int flags)
{
struct path path;
@@ -1762,7 +1767,7 @@ static int walk_component(struct nameidata *nd, int flags)
*/
if (unlikely(nd->last_type != LAST_NORM)) {
err = handle_dots(nd, nd->last_type);
- if (flags & WALK_PUT)
+ if (!(flags & WALK_MORE) && nd->depth)
put_link(nd);
return err;
}
@@ -1789,15 +1794,7 @@ static int walk_component(struct nameidata *nd, int flags)
inode = d_backing_inode(path.dentry);
}
- if (flags & WALK_PUT)
- put_link(nd);
- err = should_follow_link(nd, &path, flags & WALK_GET, inode, seq);
- if (unlikely(err))
- return err;
- path_to_nameidata(&path, nd);
- nd->inode = inode;
- nd->seq = seq;
- return 0;
+ return step_into(nd, &path, flags, inode, seq);
}
/*
@@ -2104,9 +2101,10 @@ OK:
if (!name)
return 0;
/* last component of nested symlink */
- err = walk_component(nd, WALK_GET | WALK_PUT);
+ err = walk_component(nd, WALK_FOLLOW);
} else {
- err = walk_component(nd, WALK_GET);
+ /* not the last component */
+ err = walk_component(nd, WALK_FOLLOW | WALK_MORE);
}
if (err < 0)
return err;
@@ -2248,12 +2246,7 @@ static inline int lookup_last(struct nameidata *nd)
nd->flags |= LOOKUP_FOLLOW | LOOKUP_DIRECTORY;
nd->flags &= ~LOOKUP_PARENT;
- return walk_component(nd,
- nd->flags & LOOKUP_FOLLOW
- ? nd->depth
- ? WALK_PUT | WALK_GET
- : WALK_GET
- : 0);
+ return walk_component(nd, 0);
}
/* Returns 0 and nd will be valid on success; Retuns error, otherwise. */
@@ -2558,28 +2551,9 @@ int user_path_at_empty(int dfd, const char __user *name, unsigned flags,
}
EXPORT_SYMBOL(user_path_at_empty);
-/*
- * NB: most callers don't do anything directly with the reference to the
- * to struct filename, but the nd->last pointer points into the name string
- * allocated by getname. So we must hold the reference to it until all
- * path-walking is complete.
- */
-static inline struct filename *
-user_path_parent(int dfd, const char __user *path,
- struct path *parent,
- struct qstr *last,
- int *type,
- unsigned int flags)
-{
- /* only LOOKUP_REVAL is allowed in extra flags */
- return filename_parentat(dfd, getname(path), flags & LOOKUP_REVAL,
- parent, last, type);
-}
-
/**
* mountpoint_last - look up last component for umount
* @nd: pathwalk nameidata - currently pointing at parent directory of "last"
- * @path: pointer to container for result
*
* This is a special lookup_last function just for umount. In this case, we
* need to resolve the path without doing any revalidation.
@@ -2592,23 +2566,20 @@ user_path_parent(int dfd, const char __user *path,
*
* Returns:
* -error: if there was an error during lookup. This includes -ENOENT if the
- * lookup found a negative dentry. The nd->path reference will also be
- * put in this case.
+ * lookup found a negative dentry.
*
- * 0: if we successfully resolved nd->path and found it to not to be a
- * symlink that needs to be followed. "path" will also be populated.
- * The nd->path reference will also be put.
+ * 0: if we successfully resolved nd->last and found it to not to be a
+ * symlink that needs to be followed.
*
* 1: if we successfully resolved nd->last and found it to be a symlink
- * that needs to be followed. "path" will be populated with the path
- * to the link, and nd->path will *not* be put.
+ * that needs to be followed.
*/
static int
-mountpoint_last(struct nameidata *nd, struct path *path)
+mountpoint_last(struct nameidata *nd)
{
int error = 0;
- struct dentry *dentry;
struct dentry *dir = nd->path.dentry;
+ struct path path;
/* If we're in rcuwalk, drop out of it to handle last component */
if (nd->flags & LOOKUP_RCU) {
@@ -2622,37 +2593,28 @@ mountpoint_last(struct nameidata *nd, struct path *path)
error = handle_dots(nd, nd->last_type);
if (error)
return error;
- dentry = dget(nd->path.dentry);
+ path.dentry = dget(nd->path.dentry);
} else {
- dentry = d_lookup(dir, &nd->last);
- if (!dentry) {
+ path.dentry = d_lookup(dir, &nd->last);
+ if (!path.dentry) {
/*
* No cached dentry. Mounted dentries are pinned in the
* cache, so that means that this dentry is probably
* a symlink or the path doesn't actually point
* to a mounted dentry.
*/
- dentry = lookup_slow(&nd->last, dir,
+ path.dentry = lookup_slow(&nd->last, dir,
nd->flags | LOOKUP_NO_REVAL);
- if (IS_ERR(dentry))
- return PTR_ERR(dentry);
+ if (IS_ERR(path.dentry))
+ return PTR_ERR(path.dentry);
}
}
- if (d_is_negative(dentry)) {
- dput(dentry);
+ if (d_is_negative(path.dentry)) {
+ dput(path.dentry);
return -ENOENT;
}
- if (nd->depth)
- put_link(nd);
- path->dentry = dentry;
- path->mnt = nd->path.mnt;
- error = should_follow_link(nd, path, nd->flags & LOOKUP_FOLLOW,
- d_backing_inode(dentry), 0);
- if (unlikely(error))
- return error;
- mntget(path->mnt);
- follow_mount(path);
- return 0;
+ path.mnt = nd->path.mnt;
+ return step_into(nd, &path, 0, d_backing_inode(path.dentry), 0);
}
/**
@@ -2672,13 +2634,19 @@ path_mountpoint(struct nameidata *nd, unsigned flags, struct path *path)
if (IS_ERR(s))
return PTR_ERR(s);
while (!(err = link_path_walk(s, nd)) &&
- (err = mountpoint_last(nd, path)) > 0) {
+ (err = mountpoint_last(nd)) > 0) {
s = trailing_symlink(nd);
if (IS_ERR(s)) {
err = PTR_ERR(s);
break;
}
}
+ if (!err) {
+ *path = nd->path;
+ nd->path.mnt = NULL;
+ nd->path.dentry = NULL;
+ follow_mount(path);
+ }
terminate_walk(nd);
return err;
}
@@ -3335,18 +3303,11 @@ static int do_last(struct nameidata *nd,
seq = 0; /* out of RCU mode, so the value doesn't matter */
inode = d_backing_inode(path.dentry);
finish_lookup:
- if (nd->depth)
- put_link(nd);
- error = should_follow_link(nd, &path, nd->flags & LOOKUP_FOLLOW,
- inode, seq);
+ error = step_into(nd, &path, 0, inode, seq);
if (unlikely(error))
return error;
-
- path_to_nameidata(&path, nd);
- nd->inode = inode;
- nd->seq = seq;
- /* Why this, you ask? _Now_ we might have grown LOOKUP_JUMPED... */
finish_open:
+ /* Why this, you ask? _Now_ we might have grown LOOKUP_JUMPED... */
error = complete_walk(nd);
if (error)
return error;
@@ -3861,8 +3822,8 @@ static long do_rmdir(int dfd, const char __user *pathname)
int type;
unsigned int lookup_flags = 0;
retry:
- name = user_path_parent(dfd, pathname,
- &path, &last, &type, lookup_flags);
+ name = filename_parentat(dfd, getname(pathname), lookup_flags,
+ &path, &last, &type);
if (IS_ERR(name))
return PTR_ERR(name);
@@ -3991,8 +3952,8 @@ static long do_unlinkat(int dfd, const char __user *pathname)
struct inode *delegated_inode = NULL;
unsigned int lookup_flags = 0;
retry:
- name = user_path_parent(dfd, pathname,
- &path, &last, &type, lookup_flags);
+ name = filename_parentat(dfd, getname(pathname), lookup_flags,
+ &path, &last, &type);
if (IS_ERR(name))
return PTR_ERR(name);
@@ -4491,15 +4452,15 @@ SYSCALL_DEFINE5(renameat2, int, olddfd, const char __user *, oldname,
target_flags = 0;
retry:
- from = user_path_parent(olddfd, oldname,
- &old_path, &old_last, &old_type, lookup_flags);
+ from = filename_parentat(olddfd, getname(oldname), lookup_flags,
+ &old_path, &old_last, &old_type);
if (IS_ERR(from)) {
error = PTR_ERR(from);
goto exit;
}
- to = user_path_parent(newdfd, newname,
- &new_path, &new_last, &new_type, lookup_flags);
+ to = filename_parentat(newdfd, getname(newname), lookup_flags,
+ &new_path, &new_last, &new_type);
if (IS_ERR(to)) {
error = PTR_ERR(to);
goto exit1;
diff --git a/fs/ncpfs/file.c b/fs/ncpfs/file.c
index dd38ca1f2ecb..83ca77231707 100644
--- a/fs/ncpfs/file.c
+++ b/fs/ncpfs/file.c
@@ -203,7 +203,7 @@ ncp_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
bufsize - (pos % bufsize),
iov_iter_count(from));
- if (copy_from_iter(bouncebuffer, to_write, from) != to_write) {
+ if (!copy_from_iter_full(bouncebuffer, to_write, from)) {
errno = -EFAULT;
break;
}
diff --git a/fs/orangefs/devorangefs-req.c b/fs/orangefs/devorangefs-req.c
index 516ffb4dc9a0..b0ced669427e 100644
--- a/fs/orangefs/devorangefs-req.c
+++ b/fs/orangefs/devorangefs-req.c
@@ -355,7 +355,6 @@ static ssize_t orangefs_devreq_write_iter(struct kiocb *iocb,
__u64 tag;
} head;
int total = ret = iov_iter_count(iter);
- int n;
int downcall_size = sizeof(struct orangefs_downcall_s);
int head_size = sizeof(head);
@@ -372,8 +371,7 @@ static ssize_t orangefs_devreq_write_iter(struct kiocb *iocb,
return -EFAULT;
}
- n = copy_from_iter(&head, head_size, iter);
- if (n < head_size) {
+ if (!copy_from_iter_full(&head, head_size, iter)) {
gossip_err("%s: failed to copy head.\n", __func__);
return -EFAULT;
}
@@ -407,8 +405,7 @@ static ssize_t orangefs_devreq_write_iter(struct kiocb *iocb,
return ret;
}
- n = copy_from_iter(&op->downcall, downcall_size, iter);
- if (n != downcall_size) {
+ if (!copy_from_iter_full(&op->downcall, downcall_size, iter)) {
gossip_err("%s: failed to copy downcall.\n", __func__);
goto Efault;
}
@@ -462,10 +459,8 @@ static ssize_t orangefs_devreq_write_iter(struct kiocb *iocb,
goto Enomem;
}
memset(op->downcall.trailer_buf, 0, op->downcall.trailer_size);
- n = copy_from_iter(op->downcall.trailer_buf,
- op->downcall.trailer_size,
- iter);
- if (n != op->downcall.trailer_size) {
+ if (!copy_from_iter_full(op->downcall.trailer_buf,
+ op->downcall.trailer_size, iter)) {
gossip_err("%s: failed to copy trailer.\n", __func__);
vfree(op->downcall.trailer_buf);
goto Efault;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-21 13:33:14 +0000