* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
ceph: ensure prealloc_blob is in place when removing xattr
rbd: initialize snap_rwsem in rbd_add()
ceph: enable/disable dentry complete flags via mount option
vfs: export symbol d_find_any_alias()
ceph: always initialize the dentry in open_root_dentry()
libceph: remove useless return value for osd_client __send_request()
ceph: avoid iput() while holding spinlock in ceph_dir_fsync
ceph: avoid useless dget/dput in encode_fh
ceph: dereference pointer after checking for NULL
crush: fix force for non-root TAKE
ceph: remove unnecessary d_fsdata conditional checks
ceph: Use kmemdup rather than duplicating its implementation
Fix up conflicts in fs/ceph/super.c (d_alloc_root() failure handling vs
always initialize the dentry in open_root_dentry)
}
static int ceph_mknod(struct inode *dir, struct dentry *dentry,
- int mode, dev_t rdev)
+ umode_t mode, dev_t rdev)
{
struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
struct ceph_mds_client *mdsc = fsc->mdsc;
if (ceph_snap(dir) != CEPH_NOSNAP)
return -EROFS;
- dout("mknod in dir %p dentry %p mode 0%o rdev %d\n",
+ dout("mknod in dir %p dentry %p mode 0%ho rdev %d\n",
dir, dentry, mode, rdev);
req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_MKNOD, USE_AUTH_MDS);
if (IS_ERR(req)) {
return err;
}
-static int ceph_create(struct inode *dir, struct dentry *dentry, int mode,
+static int ceph_create(struct inode *dir, struct dentry *dentry, umode_t mode,
struct nameidata *nd)
{
dout("create in dir %p dentry %p name '%.*s'\n",
return err;
}
-static int ceph_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+static int ceph_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
{
struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
struct ceph_mds_client *mdsc = fsc->mdsc;
dout("mksnap dir %p snap '%.*s' dn %p\n", dir,
dentry->d_name.len, dentry->d_name.name, dentry);
} else if (ceph_snap(dir) == CEPH_NOSNAP) {
- dout("mkdir dir %p dn %p mode 0%o\n", dir, dentry, mode);
+ dout("mkdir dir %p dn %p mode 0%ho\n", dir, dentry, mode);
op = CEPH_MDS_OP_MKDIR;
} else {
goto out;
} else if (ceph_snap(dir) == CEPH_NOSNAP) {
dout("unlink/rmdir dir %p dn %p inode %p\n",
dir, dentry, inode);
- op = ((dentry->d_inode->i_mode & S_IFMT) == S_IFDIR) ?
+ op = S_ISDIR(dentry->d_inode->i_mode) ?
CEPH_MDS_OP_RMDIR : CEPH_MDS_OP_UNLINK;
} else
goto out;
spin_lock(&dentry->d_lock);
di = ceph_dentry(dentry);
- if (di && di->lease_session) {
+ if (di->lease_session) {
s = di->lease_session;
spin_lock(&s->s_cap_lock);
gen = s->s_cap_gen;
struct ceph_dentry_info *di = ceph_dentry(dentry);
dout("d_release %p\n", dentry);
- if (di) {
- ceph_dentry_lru_del(dentry);
- if (di->lease_session)
- ceph_put_mds_session(di->lease_session);
- kmem_cache_free(ceph_dentry_cachep, di);
- dentry->d_fsdata = NULL;
- }
+ ceph_dentry_lru_del(dentry);
+ if (di->lease_session)
+ ceph_put_mds_session(di->lease_session);
+ kmem_cache_free(ceph_dentry_cachep, di);
+ dentry->d_fsdata = NULL;
}
static int ceph_snapdir_d_revalidate(struct dentry *dentry,
*/
void ceph_dir_set_complete(struct inode *inode)
{
- /* not yet implemented */
+ struct dentry *dentry = d_find_any_alias(inode);
+
+ if (dentry && ceph_dentry(dentry) &&
+ ceph_test_mount_opt(ceph_sb_to_client(dentry->d_sb), DCACHE)) {
+ dout(" marking %p (%p) complete\n", inode, dentry);
+ set_bit(CEPH_D_COMPLETE, &ceph_dentry(dentry)->flags);
+ }
+ dput(dentry);
}
void ceph_dir_clear_complete(struct inode *inode)
{
- /* not yet implemented */
+ struct dentry *dentry = d_find_any_alias(inode);
+
+ if (dentry && ceph_dentry(dentry)) {
+ dout(" marking %p (%p) complete\n", inode, dentry);
+ set_bit(CEPH_D_COMPLETE, &ceph_dentry(dentry)->flags);
+ }
+ dput(dentry);
}
bool ceph_dir_test_complete(struct inode *inode)
{
- /* not yet implemented */
+ struct dentry *dentry = d_find_any_alias(inode);
+
+ if (dentry && ceph_dentry(dentry)) {
+ dout(" marking %p (%p) NOT complete\n", inode, dentry);
+ clear_bit(CEPH_D_COMPLETE, &ceph_dentry(dentry)->flags);
+ }
+ dput(dentry);
return false;
}
do {
ceph_mdsc_get_request(req);
spin_unlock(&ci->i_unsafe_lock);
+
dout("dir_fsync %p wait on tid %llu (until %llu)\n",
inode, req->r_tid, last_tid);
if (req->r_timeout) {
} else {
wait_for_completion(&req->r_safe_completion);
}
- spin_lock(&ci->i_unsafe_lock);
ceph_mdsc_put_request(req);
+ spin_lock(&ci->i_unsafe_lock);
if (ret || list_empty(head))
break;
req = list_entry(head->next,
dout("dentry_lru_add %p %p '%.*s'\n", di, dn,
dn->d_name.len, dn->d_name.name);
- if (di) {
- mdsc = ceph_sb_to_client(dn->d_sb)->mdsc;
- spin_lock(&mdsc->dentry_lru_lock);
- list_add_tail(&di->lru, &mdsc->dentry_lru);
- mdsc->num_dentry++;
- spin_unlock(&mdsc->dentry_lru_lock);
- }
+ mdsc = ceph_sb_to_client(dn->d_sb)->mdsc;
+ spin_lock(&mdsc->dentry_lru_lock);
+ list_add_tail(&di->lru, &mdsc->dentry_lru);
+ mdsc->num_dentry++;
+ spin_unlock(&mdsc->dentry_lru_lock);
}
void ceph_dentry_lru_touch(struct dentry *dn)
dout("dentry_lru_touch %p %p '%.*s' (offset %lld)\n", di, dn,
dn->d_name.len, dn->d_name.name, di->offset);
- if (di) {
- mdsc = ceph_sb_to_client(dn->d_sb)->mdsc;
- spin_lock(&mdsc->dentry_lru_lock);
- list_move_tail(&di->lru, &mdsc->dentry_lru);
- spin_unlock(&mdsc->dentry_lru_lock);
- }
+ mdsc = ceph_sb_to_client(dn->d_sb)->mdsc;
+ spin_lock(&mdsc->dentry_lru_lock);
+ list_move_tail(&di->lru, &mdsc->dentry_lru);
+ spin_unlock(&mdsc->dentry_lru_lock);
}
void ceph_dentry_lru_del(struct dentry *dn)
dout("dentry_lru_del %p %p '%.*s'\n", di, dn,
dn->d_name.len, dn->d_name.name);
- if (di) {
- mdsc = ceph_sb_to_client(dn->d_sb)->mdsc;
- spin_lock(&mdsc->dentry_lru_lock);
- list_del_init(&di->lru);
- mdsc->num_dentry--;
- spin_unlock(&mdsc->dentry_lru_lock);
- }
+ mdsc = ceph_sb_to_client(dn->d_sb)->mdsc;
+ spin_lock(&mdsc->dentry_lru_lock);
+ list_del_init(&di->lru);
+ mdsc->num_dentry--;
+ spin_unlock(&mdsc->dentry_lru_lock);
}
/*
struct inode *inode = container_of(head, struct inode, i_rcu);
struct ceph_inode_info *ci = ceph_inode(inode);
- INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(ceph_inode_cachep, ci);
}
{
struct dentry *dir = dn->d_parent;
struct inode *inode = dir->d_inode;
- struct ceph_inode_info *ci = ceph_inode(inode);
+ struct ceph_inode_info *ci;
struct ceph_dentry_info *di;
BUG_ON(!inode);
+ ci = ceph_inode(inode);
di = ceph_dentry(dn);
spin_lock(&ci->i_ceph_lock);
Opt_rbytes,
Opt_norbytes,
Opt_noasyncreaddir,
+ Opt_dcache,
+ Opt_nodcache,
Opt_ino32,
};
{Opt_rbytes, "rbytes"},
{Opt_norbytes, "norbytes"},
{Opt_noasyncreaddir, "noasyncreaddir"},
+ {Opt_dcache, "dcache"},
+ {Opt_nodcache, "nodcache"},
{Opt_ino32, "ino32"},
{-1, NULL}
};
case Opt_noasyncreaddir:
fsopt->flags |= CEPH_MOUNT_OPT_NOASYNCREADDIR;
break;
+ case Opt_dcache:
+ fsopt->flags |= CEPH_MOUNT_OPT_DCACHE;
+ break;
+ case Opt_nodcache:
+ fsopt->flags &= ~CEPH_MOUNT_OPT_DCACHE;
+ break;
case Opt_ino32:
fsopt->flags |= CEPH_MOUNT_OPT_INO32;
break;
/**
* ceph_show_options - Show mount options in /proc/mounts
* @m: seq_file to write to
- * @mnt: mount descriptor
+ * @root: root of that (sub)tree
*/
-static int ceph_show_options(struct seq_file *m, struct vfsmount *mnt)
+static int ceph_show_options(struct seq_file *m, struct dentry *root)
{
- struct ceph_fs_client *fsc = ceph_sb_to_client(mnt->mnt_sb);
+ struct ceph_fs_client *fsc = ceph_sb_to_client(root->d_sb);
struct ceph_mount_options *fsopt = fsc->mount_options;
struct ceph_options *opt = fsc->client->options;
seq_puts(m, ",norbytes");
if (fsopt->flags & CEPH_MOUNT_OPT_NOASYNCREADDIR)
seq_puts(m, ",noasyncreaddir");
+ if (fsopt->flags & CEPH_MOUNT_OPT_DCACHE)
+ seq_puts(m, ",dcache");
+ else
+ seq_puts(m, ",nodcache");
if (fsopt->wsize)
seq_printf(m, ",wsize=%d", fsopt->wsize);
req->r_num_caps = 2;
err = ceph_mdsc_do_request(mdsc, NULL, req);
if (err == 0) {
+ struct inode *inode = req->r_target_inode;
+ req->r_target_inode = NULL;
dout("open_root_inode success\n");
- if (ceph_ino(req->r_target_inode) == CEPH_INO_ROOT &&
- fsc->sb->s_root == NULL)
- root = d_alloc_root(req->r_target_inode);
- else
- root = d_obtain_alias(req->r_target_inode);
+ if (ceph_ino(inode) == CEPH_INO_ROOT &&
+ fsc->sb->s_root == NULL) {
+ root = d_alloc_root(inode);
+ if (!root) {
+ iput(inode);
+ root = ERR_PTR(-ENOMEM);
+ goto out;
+ }
- ceph_init_dentry(root);
+ } else {
+ root = d_obtain_alias(inode);
+ }
+ ceph_init_dentry(root);
- req->r_target_inode = NULL;
dout("open_root_inode success, root dentry is %p\n", root);
} else {
root = ERR_PTR(err);
}
+out:
ceph_mdsc_put_request(req);
return root;
}
#define CEPH_MOUNT_OPT_RBYTES (1<<5) /* dir st_bytes = rbytes */
#define CEPH_MOUNT_OPT_NOASYNCREADDIR (1<<7) /* no dcache readdir */
#define CEPH_MOUNT_OPT_INO32 (1<<8) /* 32 bit inos */
+ #define CEPH_MOUNT_OPT_DCACHE (1<<9) /* use dcache for readdir etc */
#define CEPH_MOUNT_OPT_DEFAULT (CEPH_MOUNT_OPT_RBYTES)
int issued, dirty;
struct ceph_snap_context *context;
- mode_t mode;
+ umode_t mode;
uid_t uid;
gid_t gid;
#include <linux/prefetch.h>
#include <linux/ratelimit.h>
#include "internal.h"
+#include "mount.h"
/*
* Usage:
static void __dentry_lru_del(struct dentry *dentry)
{
list_del_init(&dentry->d_lru);
+ dentry->d_flags &= ~DCACHE_SHRINK_LIST;
dentry->d_sb->s_nr_dentry_unused--;
dentry_stat.nr_unused--;
}
}
}
-static void dentry_lru_move_tail(struct dentry *dentry)
+static void dentry_lru_move_list(struct dentry *dentry, struct list_head *list)
{
spin_lock(&dcache_lru_lock);
if (list_empty(&dentry->d_lru)) {
- list_add_tail(&dentry->d_lru, &dentry->d_sb->s_dentry_lru);
+ list_add_tail(&dentry->d_lru, list);
dentry->d_sb->s_nr_dentry_unused++;
dentry_stat.nr_unused++;
} else {
- list_move_tail(&dentry->d_lru, &dentry->d_sb->s_dentry_lru);
+ list_move_tail(&dentry->d_lru, list);
}
spin_unlock(&dcache_lru_lock);
}
}
/**
- * __shrink_dcache_sb - shrink the dentry LRU on a given superblock
- * @sb: superblock to shrink dentry LRU.
- * @count: number of entries to prune
- * @flags: flags to control the dentry processing
+ * prune_dcache_sb - shrink the dcache
+ * @sb: superblock
+ * @count: number of entries to try to free
+ *
+ * Attempt to shrink the superblock dcache LRU by @count entries. This is
+ * done when we need more memory an called from the superblock shrinker
+ * function.
*
- * If flags contains DCACHE_REFERENCED reference dentries will not be pruned.
+ * This function may fail to free any resources if all the dentries are in
+ * use.
*/
-static void __shrink_dcache_sb(struct super_block *sb, int count, int flags)
+void prune_dcache_sb(struct super_block *sb, int count)
{
struct dentry *dentry;
LIST_HEAD(referenced);
goto relock;
}
- /*
- * If we are honouring the DCACHE_REFERENCED flag and the
- * dentry has this flag set, don't free it. Clear the flag
- * and put it back on the LRU.
- */
- if (flags & DCACHE_REFERENCED &&
- dentry->d_flags & DCACHE_REFERENCED) {
+ if (dentry->d_flags & DCACHE_REFERENCED) {
dentry->d_flags &= ~DCACHE_REFERENCED;
list_move(&dentry->d_lru, &referenced);
spin_unlock(&dentry->d_lock);
} else {
list_move_tail(&dentry->d_lru, &tmp);
+ dentry->d_flags |= DCACHE_SHRINK_LIST;
spin_unlock(&dentry->d_lock);
if (!--count)
break;
shrink_dentry_list(&tmp);
}
-/**
- * prune_dcache_sb - shrink the dcache
- * @sb: superblock
- * @nr_to_scan: number of entries to try to free
- *
- * Attempt to shrink the superblock dcache LRU by @nr_to_scan entries. This is
- * done when we need more memory an called from the superblock shrinker
- * function.
- *
- * This function may fail to free any resources if all the dentries are in
- * use.
- */
-void prune_dcache_sb(struct super_block *sb, int nr_to_scan)
-{
- __shrink_dcache_sb(sb, nr_to_scan, DCACHE_REFERENCED);
-}
-
/**
* shrink_dcache_sb - shrink dcache for a superblock
* @sb: superblock
* drop the lock and return early due to latency
* constraints.
*/
-static int select_parent(struct dentry * parent)
+static int select_parent(struct dentry *parent, struct list_head *dispose)
{
struct dentry *this_parent;
struct list_head *next;
spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
- /*
- * move only zero ref count dentries to the end
- * of the unused list for prune_dcache
+ /*
+ * move only zero ref count dentries to the dispose list.
+ *
+ * Those which are presently on the shrink list, being processed
+ * by shrink_dentry_list(), shouldn't be moved. Otherwise the
+ * loop in shrink_dcache_parent() might not make any progress
+ * and loop forever.
*/
- if (!dentry->d_count) {
- dentry_lru_move_tail(dentry);
- found++;
- } else {
+ if (dentry->d_count) {
dentry_lru_del(dentry);
+ } else if (!(dentry->d_flags & DCACHE_SHRINK_LIST)) {
+ dentry_lru_move_list(dentry, dispose);
+ dentry->d_flags |= DCACHE_SHRINK_LIST;
+ found++;
}
-
/*
* We can return to the caller if we have found some (this
* ensures forward progress). We'll be coming back to find
*
* Prune the dcache to remove unused children of the parent dentry.
*/
-
void shrink_dcache_parent(struct dentry * parent)
{
- struct super_block *sb = parent->d_sb;
+ LIST_HEAD(dispose);
int found;
- while ((found = select_parent(parent)) != 0)
- __shrink_dcache_sb(sb, found, 0);
+ while ((found = select_parent(parent, &dispose)) != 0)
+ shrink_dentry_list(&dispose);
}
EXPORT_SYMBOL(shrink_dcache_parent);
}
EXPORT_SYMBOL(d_alloc_root);
+struct dentry *d_make_root(struct inode *root_inode)
+{
+ struct dentry *res = NULL;
+
+ if (root_inode) {
+ static const struct qstr name = { .name = "/", .len = 1 };
+
+ res = __d_alloc(root_inode->i_sb, &name);
+ if (res)
+ d_instantiate(res, root_inode);
+ else
+ iput(root_inode);
+ }
+ return res;
+}
+EXPORT_SYMBOL(d_make_root);
+
static struct dentry * __d_find_any_alias(struct inode *inode)
{
struct dentry *alias;
return alias;
}
- static struct dentry * d_find_any_alias(struct inode *inode)
+ /**
+ * d_find_any_alias - find any alias for a given inode
+ * @inode: inode to find an alias for
+ *
+ * If any aliases exist for the given inode, take and return a
+ * reference for one of them. If no aliases exist, return %NULL.
+ */
+ struct dentry *d_find_any_alias(struct inode *inode)
{
struct dentry *de;
spin_unlock(&inode->i_lock);
return de;
}
-
+ EXPORT_SYMBOL(d_find_any_alias);
/**
* d_obtain_alias - find or allocate a dentry for a given inode
{
struct dentry *dentry = path->dentry;
struct vfsmount *vfsmnt = path->mnt;
+ struct mount *mnt = real_mount(vfsmnt);
bool slash = false;
int error = 0;
if (dentry == vfsmnt->mnt_root || IS_ROOT(dentry)) {
/* Global root? */
- if (vfsmnt->mnt_parent == vfsmnt) {
+ if (!mnt_has_parent(mnt))
goto global_root;
- }
- dentry = vfsmnt->mnt_mountpoint;
- vfsmnt = vfsmnt->mnt_parent;
+ dentry = mnt->mnt_mountpoint;
+ mnt = mnt->mnt_parent;
+ vfsmnt = &mnt->mnt;
continue;
}
parent = dentry->d_parent;
if (!slash)
error = prepend(buffer, buflen, "/", 1);
if (!error)
- error = vfsmnt->mnt_ns ? 1 : 2;
+ error = real_mount(vfsmnt)->mnt_ns ? 1 : 2;
goto out;
}
return result;
}
-int path_is_under(struct path *path1, struct path *path2)
-{
- struct vfsmount *mnt = path1->mnt;
- struct dentry *dentry = path1->dentry;
- int res;
-
- br_read_lock(vfsmount_lock);
- if (mnt != path2->mnt) {
- for (;;) {
- if (mnt->mnt_parent == mnt) {
- br_read_unlock(vfsmount_lock);
- return 0;
- }
- if (mnt->mnt_parent == path2->mnt)
- break;
- mnt = mnt->mnt_parent;
- }
- dentry = mnt->mnt_mountpoint;
- }
- res = is_subdir(dentry, path2->dentry);
- br_read_unlock(vfsmount_lock);
- return res;
-}
-EXPORT_SYMBOL(path_is_under);
-
void d_genocide(struct dentry *root)
{
struct dentry *this_parent;
#define DCACHE_CANT_MOUNT 0x0100
#define DCACHE_GENOCIDE 0x0200
+#define DCACHE_SHRINK_LIST 0x0400
#define DCACHE_NFSFS_RENAMED 0x1000
/* this dentry has been "silly renamed" and has to be deleted on the last
extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *);
extern struct dentry * d_splice_alias(struct inode *, struct dentry *);
extern struct dentry * d_add_ci(struct dentry *, struct inode *, struct qstr *);
+ extern struct dentry *d_find_any_alias(struct inode *inode);
extern struct dentry * d_obtain_alias(struct inode *);
extern void shrink_dcache_sb(struct super_block *);
extern void shrink_dcache_parent(struct dentry *);
/* only used at mount-time */
extern struct dentry * d_alloc_root(struct inode *);
+extern struct dentry * d_make_root(struct inode *);
/* <clickety>-<click> the ramfs-type tree */
extern void d_genocide(struct dentry *);
projects / firefly-linux-kernel-4.4.55.git / commitdiff