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Diffstat (limited to 'fs/ceph/xattr.c')
-rw-r--r--fs/ceph/xattr.c218
1 files changed, 41 insertions, 177 deletions
diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c
index 9410abdef3ce..4870b29df224 100644
--- a/fs/ceph/xattr.c
+++ b/fs/ceph/xattr.c
@@ -16,6 +16,8 @@
static int __remove_xattr(struct ceph_inode_info *ci,
struct ceph_inode_xattr *xattr);
+const struct xattr_handler ceph_other_xattr_handler;
+
/*
* List of handlers for synthetic system.* attributes. Other
* attributes are handled directly.
@@ -25,6 +27,7 @@ const struct xattr_handler *ceph_xattr_handlers[] = {
&posix_acl_access_xattr_handler,
&posix_acl_default_xattr_handler,
#endif
+ &ceph_other_xattr_handler,
NULL,
};
@@ -33,7 +36,6 @@ static bool ceph_is_valid_xattr(const char *name)
return !strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN) ||
!strncmp(name, XATTR_SECURITY_PREFIX,
XATTR_SECURITY_PREFIX_LEN) ||
- !strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN) ||
!strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) ||
!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
}
@@ -75,7 +77,7 @@ static size_t ceph_vxattrcb_layout(struct ceph_inode_info *ci, char *val,
char buf[128];
dout("ceph_vxattrcb_layout %p\n", &ci->vfs_inode);
- down_read(&osdc->map_sem);
+ down_read(&osdc->lock);
pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool);
if (pool_name) {
size_t len = strlen(pool_name);
@@ -107,7 +109,7 @@ static size_t ceph_vxattrcb_layout(struct ceph_inode_info *ci, char *val,
ret = -ERANGE;
}
}
- up_read(&osdc->map_sem);
+ up_read(&osdc->lock);
return ret;
}
@@ -141,13 +143,13 @@ static size_t ceph_vxattrcb_layout_pool(struct ceph_inode_info *ci,
s64 pool = ceph_file_layout_pg_pool(ci->i_layout);
const char *pool_name;
- down_read(&osdc->map_sem);
+ down_read(&osdc->lock);
pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool);
if (pool_name)
ret = snprintf(val, size, "%s", pool_name);
else
ret = snprintf(val, size, "%lld", (unsigned long long)pool);
- up_read(&osdc->map_sem);
+ up_read(&osdc->lock);
return ret;
}
@@ -496,19 +498,6 @@ static int __remove_xattr(struct ceph_inode_info *ci,
return 0;
}
-static int __remove_xattr_by_name(struct ceph_inode_info *ci,
- const char *name)
-{
- struct rb_node **p;
- struct ceph_inode_xattr *xattr;
- int err;
-
- p = &ci->i_xattrs.index.rb_node;
- xattr = __get_xattr(ci, name);
- err = __remove_xattr(ci, xattr);
- return err;
-}
-
static char *__copy_xattr_names(struct ceph_inode_info *ci,
char *dest)
{
@@ -740,9 +729,6 @@ ssize_t __ceph_getxattr(struct inode *inode, const char *name, void *value,
int req_mask;
int err;
- if (!ceph_is_valid_xattr(name))
- return -ENODATA;
-
/* let's see if a virtual xattr was requested */
vxattr = ceph_match_vxattr(inode, name);
if (vxattr) {
@@ -804,15 +790,6 @@ out:
return err;
}
-ssize_t ceph_getxattr(struct dentry *dentry, const char *name, void *value,
- size_t size)
-{
- if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
- return generic_getxattr(dentry, name, value, size);
-
- return __ceph_getxattr(d_inode(dentry), name, value, size);
-}
-
ssize_t ceph_listxattr(struct dentry *dentry, char *names, size_t size)
{
struct inode *inode = d_inode(dentry);
@@ -877,15 +854,15 @@ out:
return err;
}
-static int ceph_sync_setxattr(struct dentry *dentry, const char *name,
+static int ceph_sync_setxattr(struct inode *inode, const char *name,
const char *value, size_t size, int flags)
{
- struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb);
- struct inode *inode = d_inode(dentry);
+ struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb);
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_mds_request *req;
struct ceph_mds_client *mdsc = fsc->mdsc;
struct ceph_pagelist *pagelist = NULL;
+ int op = CEPH_MDS_OP_SETXATTR;
int err;
if (size > 0) {
@@ -899,20 +876,21 @@ static int ceph_sync_setxattr(struct dentry *dentry, const char *name,
if (err)
goto out;
} else if (!value) {
- flags |= CEPH_XATTR_REMOVE;
+ if (flags & CEPH_XATTR_REPLACE)
+ op = CEPH_MDS_OP_RMXATTR;
+ else
+ flags |= CEPH_XATTR_REMOVE;
}
dout("setxattr value=%.*s\n", (int)size, value);
/* do request */
- req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETXATTR,
- USE_AUTH_MDS);
+ req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS);
if (IS_ERR(req)) {
err = PTR_ERR(req);
goto out;
}
- req->r_args.setxattr.flags = cpu_to_le32(flags);
req->r_path2 = kstrdup(name, GFP_NOFS);
if (!req->r_path2) {
ceph_mdsc_put_request(req);
@@ -920,8 +898,11 @@ static int ceph_sync_setxattr(struct dentry *dentry, const char *name,
goto out;
}
- req->r_pagelist = pagelist;
- pagelist = NULL;
+ if (op == CEPH_MDS_OP_SETXATTR) {
+ req->r_args.setxattr.flags = cpu_to_le32(flags);
+ req->r_pagelist = pagelist;
+ pagelist = NULL;
+ }
req->r_inode = inode;
ihold(inode);
@@ -939,13 +920,12 @@ out:
return err;
}
-int __ceph_setxattr(struct dentry *dentry, const char *name,
+int __ceph_setxattr(struct inode *inode, const char *name,
const void *value, size_t size, int flags)
{
- struct inode *inode = d_inode(dentry);
struct ceph_vxattr *vxattr;
struct ceph_inode_info *ci = ceph_inode(inode);
- struct ceph_mds_client *mdsc = ceph_sb_to_client(dentry->d_sb)->mdsc;
+ struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
struct ceph_cap_flush *prealloc_cf = NULL;
int issued;
int err;
@@ -958,8 +938,8 @@ int __ceph_setxattr(struct dentry *dentry, const char *name,
int required_blob_size;
bool lock_snap_rwsem = false;
- if (!ceph_is_valid_xattr(name))
- return -EOPNOTSUPP;
+ if (ceph_snap(inode) != CEPH_NOSNAP)
+ return -EROFS;
vxattr = ceph_match_vxattr(inode, name);
if (vxattr && vxattr->readonly)
@@ -1056,7 +1036,7 @@ do_sync_unlocked:
"during filling trace\n", inode);
err = -EBUSY;
} else {
- err = ceph_sync_setxattr(dentry, name, value, size, flags);
+ err = ceph_sync_setxattr(inode, name, value, size, flags);
}
out:
ceph_free_cap_flush(prealloc_cf);
@@ -1066,146 +1046,30 @@ out:
return err;
}
-int ceph_setxattr(struct dentry *dentry, const char *name,
- const void *value, size_t size, int flags)
+static int ceph_get_xattr_handler(const struct xattr_handler *handler,
+ struct dentry *dentry, struct inode *inode,
+ const char *name, void *value, size_t size)
{
- if (ceph_snap(d_inode(dentry)) != CEPH_NOSNAP)
- return -EROFS;
-
- if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
- return generic_setxattr(dentry, name, value, size, flags);
-
- if (size == 0)
- value = ""; /* empty EA, do not remove */
-
- return __ceph_setxattr(dentry, name, value, size, flags);
-}
-
-static int ceph_send_removexattr(struct dentry *dentry, const char *name)
-{
- struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb);
- struct ceph_mds_client *mdsc = fsc->mdsc;
- struct inode *inode = d_inode(dentry);
- struct ceph_mds_request *req;
- int err;
-
- req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RMXATTR,
- USE_AUTH_MDS);
- if (IS_ERR(req))
- return PTR_ERR(req);
- req->r_path2 = kstrdup(name, GFP_NOFS);
- if (!req->r_path2)
- return -ENOMEM;
-
- req->r_inode = inode;
- ihold(inode);
- req->r_num_caps = 1;
- req->r_inode_drop = CEPH_CAP_XATTR_SHARED;
- err = ceph_mdsc_do_request(mdsc, NULL, req);
- ceph_mdsc_put_request(req);
- return err;
+ if (!ceph_is_valid_xattr(name))
+ return -EOPNOTSUPP;
+ return __ceph_getxattr(inode, name, value, size);
}
-int __ceph_removexattr(struct dentry *dentry, const char *name)
+static int ceph_set_xattr_handler(const struct xattr_handler *handler,
+ struct dentry *unused, struct inode *inode,
+ const char *name, const void *value,
+ size_t size, int flags)
{
- struct inode *inode = d_inode(dentry);
- struct ceph_vxattr *vxattr;
- struct ceph_inode_info *ci = ceph_inode(inode);
- struct ceph_mds_client *mdsc = ceph_sb_to_client(dentry->d_sb)->mdsc;
- struct ceph_cap_flush *prealloc_cf = NULL;
- int issued;
- int err;
- int required_blob_size;
- int dirty;
- bool lock_snap_rwsem = false;
-
if (!ceph_is_valid_xattr(name))
return -EOPNOTSUPP;
-
- vxattr = ceph_match_vxattr(inode, name);
- if (vxattr && vxattr->readonly)
- return -EOPNOTSUPP;
-
- /* pass any unhandled ceph.* xattrs through to the MDS */
- if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN))
- goto do_sync_unlocked;
-
- prealloc_cf = ceph_alloc_cap_flush();
- if (!prealloc_cf)
- return -ENOMEM;
-
- err = -ENOMEM;
- spin_lock(&ci->i_ceph_lock);
-retry:
- issued = __ceph_caps_issued(ci, NULL);
- if (ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL))
- goto do_sync;
-
- if (!lock_snap_rwsem && !ci->i_head_snapc) {
- lock_snap_rwsem = true;
- if (!down_read_trylock(&mdsc->snap_rwsem)) {
- spin_unlock(&ci->i_ceph_lock);
- down_read(&mdsc->snap_rwsem);
- spin_lock(&ci->i_ceph_lock);
- goto retry;
- }
- }
-
- dout("removexattr %p issued %s\n", inode, ceph_cap_string(issued));
-
- __build_xattrs(inode);
-
- required_blob_size = __get_required_blob_size(ci, 0, 0);
-
- if (!ci->i_xattrs.prealloc_blob ||
- required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) {
- struct ceph_buffer *blob;
-
- spin_unlock(&ci->i_ceph_lock);
- dout(" preaallocating new blob size=%d\n", required_blob_size);
- blob = ceph_buffer_new(required_blob_size, GFP_NOFS);
- if (!blob)
- goto do_sync_unlocked;
- spin_lock(&ci->i_ceph_lock);
- if (ci->i_xattrs.prealloc_blob)
- ceph_buffer_put(ci->i_xattrs.prealloc_blob);
- ci->i_xattrs.prealloc_blob = blob;
- goto retry;
- }
-
- err = __remove_xattr_by_name(ceph_inode(inode), name);
-
- dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL,
- &prealloc_cf);
- ci->i_xattrs.dirty = true;
- inode->i_ctime = current_fs_time(inode->i_sb);
- spin_unlock(&ci->i_ceph_lock);
- if (lock_snap_rwsem)
- up_read(&mdsc->snap_rwsem);
- if (dirty)
- __mark_inode_dirty(inode, dirty);
- ceph_free_cap_flush(prealloc_cf);
- return err;
-do_sync:
- spin_unlock(&ci->i_ceph_lock);
-do_sync_unlocked:
- if (lock_snap_rwsem)
- up_read(&mdsc->snap_rwsem);
- ceph_free_cap_flush(prealloc_cf);
- err = ceph_send_removexattr(dentry, name);
- return err;
+ return __ceph_setxattr(inode, name, value, size, flags);
}
-int ceph_removexattr(struct dentry *dentry, const char *name)
-{
- if (ceph_snap(d_inode(dentry)) != CEPH_NOSNAP)
- return -EROFS;
-
- if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
- return generic_removexattr(dentry, name);
-
- return __ceph_removexattr(dentry, name);
-}
+const struct xattr_handler ceph_other_xattr_handler = {
+ .prefix = "", /* match any name => handlers called with full name */
+ .get = ceph_get_xattr_handler,
+ .set = ceph_set_xattr_handler,
+};
#ifdef CONFIG_SECURITY
bool ceph_security_xattr_wanted(struct inode *in)