1 #include <linux/ceph/ceph_debug.h>
4 #include "mds_client.h"
6 #include <linux/ceph/decode.h>
8 #include <linux/xattr.h>
9 #include <linux/slab.h>
11 #define XATTR_CEPH_PREFIX "ceph."
12 #define XATTR_CEPH_PREFIX_LEN (sizeof (XATTR_CEPH_PREFIX) - 1)
14 static bool ceph_is_valid_xattr(const char *name)
16 return !strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN) ||
17 !strncmp(name, XATTR_SECURITY_PREFIX,
18 XATTR_SECURITY_PREFIX_LEN) ||
19 !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) ||
20 !strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
24 * These define virtual xattrs exposing the recursive directory
25 * statistics and layout metadata.
29 size_t name_size; /* strlen(name) + 1 (for '\0') */
30 size_t (*getxattr_cb)(struct ceph_inode_info *ci, char *val,
32 bool readonly, hidden;
37 static size_t ceph_vxattrcb_dir_entries(struct ceph_inode_info *ci, char *val,
40 return snprintf(val, size, "%lld", ci->i_files + ci->i_subdirs);
43 static size_t ceph_vxattrcb_dir_files(struct ceph_inode_info *ci, char *val,
46 return snprintf(val, size, "%lld", ci->i_files);
49 static size_t ceph_vxattrcb_dir_subdirs(struct ceph_inode_info *ci, char *val,
52 return snprintf(val, size, "%lld", ci->i_subdirs);
55 static size_t ceph_vxattrcb_dir_rentries(struct ceph_inode_info *ci, char *val,
58 return snprintf(val, size, "%lld", ci->i_rfiles + ci->i_rsubdirs);
61 static size_t ceph_vxattrcb_dir_rfiles(struct ceph_inode_info *ci, char *val,
64 return snprintf(val, size, "%lld", ci->i_rfiles);
67 static size_t ceph_vxattrcb_dir_rsubdirs(struct ceph_inode_info *ci, char *val,
70 return snprintf(val, size, "%lld", ci->i_rsubdirs);
73 static size_t ceph_vxattrcb_dir_rbytes(struct ceph_inode_info *ci, char *val,
76 return snprintf(val, size, "%lld", ci->i_rbytes);
79 static size_t ceph_vxattrcb_dir_rctime(struct ceph_inode_info *ci, char *val,
82 return snprintf(val, size, "%ld.09%ld", (long)ci->i_rctime.tv_sec,
83 (long)ci->i_rctime.tv_nsec);
86 #define CEPH_XATTR_NAME(_type, _name) XATTR_CEPH_PREFIX #_type "." #_name
88 #define XATTR_NAME_CEPH(_type, _name) \
90 .name = CEPH_XATTR_NAME(_type, _name), \
91 .name_size = sizeof (CEPH_XATTR_NAME(_type, _name)), \
92 .getxattr_cb = ceph_vxattrcb_ ## _type ## _ ## _name, \
97 static struct ceph_vxattr ceph_dir_vxattrs[] = {
98 XATTR_NAME_CEPH(dir, entries),
99 XATTR_NAME_CEPH(dir, files),
100 XATTR_NAME_CEPH(dir, subdirs),
101 XATTR_NAME_CEPH(dir, rentries),
102 XATTR_NAME_CEPH(dir, rfiles),
103 XATTR_NAME_CEPH(dir, rsubdirs),
104 XATTR_NAME_CEPH(dir, rbytes),
105 XATTR_NAME_CEPH(dir, rctime),
106 { 0 } /* Required table terminator */
108 static size_t ceph_dir_vxattrs_name_size; /* total size of all names */
112 static size_t ceph_vxattrcb_file_layout(struct ceph_inode_info *ci, char *val,
117 ret = snprintf(val, size,
118 "chunk_bytes=%lld\nstripe_count=%lld\nobject_size=%lld\n",
119 (unsigned long long)ceph_file_layout_su(ci->i_layout),
120 (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout),
121 (unsigned long long)ceph_file_layout_object_size(ci->i_layout));
125 static struct ceph_vxattr ceph_file_vxattrs[] = {
126 XATTR_NAME_CEPH(file, layout),
127 { 0 } /* Required table terminator */
129 static size_t ceph_file_vxattrs_name_size; /* total size of all names */
131 static struct ceph_vxattr *ceph_inode_vxattrs(struct inode *inode)
133 if (S_ISDIR(inode->i_mode))
134 return ceph_dir_vxattrs;
135 else if (S_ISREG(inode->i_mode))
136 return ceph_file_vxattrs;
140 static size_t ceph_vxattrs_name_size(struct ceph_vxattr *vxattrs)
142 if (vxattrs == ceph_dir_vxattrs)
143 return ceph_dir_vxattrs_name_size;
144 if (vxattrs == ceph_file_vxattrs)
145 return ceph_file_vxattrs_name_size;
152 * Compute the aggregate size (including terminating '\0') of all
153 * virtual extended attribute names in the given vxattr table.
155 static size_t __init vxattrs_name_size(struct ceph_vxattr *vxattrs)
157 struct ceph_vxattr *vxattr;
160 for (vxattr = vxattrs; vxattr->name; vxattr++)
162 size += vxattr->name_size;
167 /* Routines called at initialization and exit time */
169 void __init ceph_xattr_init(void)
171 ceph_dir_vxattrs_name_size = vxattrs_name_size(ceph_dir_vxattrs);
172 ceph_file_vxattrs_name_size = vxattrs_name_size(ceph_file_vxattrs);
175 void ceph_xattr_exit(void)
177 ceph_dir_vxattrs_name_size = 0;
178 ceph_file_vxattrs_name_size = 0;
181 static struct ceph_vxattr *ceph_match_vxattr(struct inode *inode,
184 struct ceph_vxattr *vxattr = ceph_inode_vxattrs(inode);
187 while (vxattr->name) {
188 if (!strcmp(vxattr->name, name))
197 static int __set_xattr(struct ceph_inode_info *ci,
198 const char *name, int name_len,
199 const char *val, int val_len,
201 int should_free_name, int should_free_val,
202 struct ceph_inode_xattr **newxattr)
205 struct rb_node *parent = NULL;
206 struct ceph_inode_xattr *xattr = NULL;
210 p = &ci->i_xattrs.index.rb_node;
213 xattr = rb_entry(parent, struct ceph_inode_xattr, node);
214 c = strncmp(name, xattr->name, min(name_len, xattr->name_len));
220 if (name_len == xattr->name_len)
222 else if (name_len < xattr->name_len)
234 xattr->name_len = name_len;
235 xattr->should_free_name = should_free_name;
237 ci->i_xattrs.count++;
238 dout("__set_xattr count=%d\n", ci->i_xattrs.count);
242 if (xattr->should_free_val)
243 kfree((void *)xattr->val);
245 if (should_free_name) {
249 ci->i_xattrs.names_size -= xattr->name_len;
250 ci->i_xattrs.vals_size -= xattr->val_len;
252 ci->i_xattrs.names_size += name_len;
253 ci->i_xattrs.vals_size += val_len;
259 xattr->val_len = val_len;
260 xattr->dirty = dirty;
261 xattr->should_free_val = (val && should_free_val);
264 rb_link_node(&xattr->node, parent, p);
265 rb_insert_color(&xattr->node, &ci->i_xattrs.index);
266 dout("__set_xattr_val p=%p\n", p);
269 dout("__set_xattr_val added %llx.%llx xattr %p %s=%.*s\n",
270 ceph_vinop(&ci->vfs_inode), xattr, name, val_len, val);
275 static struct ceph_inode_xattr *__get_xattr(struct ceph_inode_info *ci,
279 struct rb_node *parent = NULL;
280 struct ceph_inode_xattr *xattr = NULL;
281 int name_len = strlen(name);
284 p = &ci->i_xattrs.index.rb_node;
287 xattr = rb_entry(parent, struct ceph_inode_xattr, node);
288 c = strncmp(name, xattr->name, xattr->name_len);
289 if (c == 0 && name_len > xattr->name_len)
296 dout("__get_xattr %s: found %.*s\n", name,
297 xattr->val_len, xattr->val);
302 dout("__get_xattr %s: not found\n", name);
307 static void __free_xattr(struct ceph_inode_xattr *xattr)
311 if (xattr->should_free_name)
312 kfree((void *)xattr->name);
313 if (xattr->should_free_val)
314 kfree((void *)xattr->val);
319 static int __remove_xattr(struct ceph_inode_info *ci,
320 struct ceph_inode_xattr *xattr)
325 rb_erase(&xattr->node, &ci->i_xattrs.index);
327 if (xattr->should_free_name)
328 kfree((void *)xattr->name);
329 if (xattr->should_free_val)
330 kfree((void *)xattr->val);
332 ci->i_xattrs.names_size -= xattr->name_len;
333 ci->i_xattrs.vals_size -= xattr->val_len;
334 ci->i_xattrs.count--;
340 static int __remove_xattr_by_name(struct ceph_inode_info *ci,
344 struct ceph_inode_xattr *xattr;
347 p = &ci->i_xattrs.index.rb_node;
348 xattr = __get_xattr(ci, name);
349 err = __remove_xattr(ci, xattr);
353 static char *__copy_xattr_names(struct ceph_inode_info *ci,
357 struct ceph_inode_xattr *xattr = NULL;
359 p = rb_first(&ci->i_xattrs.index);
360 dout("__copy_xattr_names count=%d\n", ci->i_xattrs.count);
363 xattr = rb_entry(p, struct ceph_inode_xattr, node);
364 memcpy(dest, xattr->name, xattr->name_len);
365 dest[xattr->name_len] = '\0';
367 dout("dest=%s %p (%s) (%d/%d)\n", dest, xattr, xattr->name,
368 xattr->name_len, ci->i_xattrs.names_size);
370 dest += xattr->name_len + 1;
377 void __ceph_destroy_xattrs(struct ceph_inode_info *ci)
379 struct rb_node *p, *tmp;
380 struct ceph_inode_xattr *xattr = NULL;
382 p = rb_first(&ci->i_xattrs.index);
384 dout("__ceph_destroy_xattrs p=%p\n", p);
387 xattr = rb_entry(p, struct ceph_inode_xattr, node);
390 dout("__ceph_destroy_xattrs next p=%p (%.*s)\n", p,
391 xattr->name_len, xattr->name);
392 rb_erase(tmp, &ci->i_xattrs.index);
397 ci->i_xattrs.names_size = 0;
398 ci->i_xattrs.vals_size = 0;
399 ci->i_xattrs.index_version = 0;
400 ci->i_xattrs.count = 0;
401 ci->i_xattrs.index = RB_ROOT;
404 static int __build_xattrs(struct inode *inode)
405 __releases(ci->i_ceph_lock)
406 __acquires(ci->i_ceph_lock)
412 const char *name, *val;
413 struct ceph_inode_info *ci = ceph_inode(inode);
415 struct ceph_inode_xattr **xattrs = NULL;
419 dout("__build_xattrs() len=%d\n",
420 ci->i_xattrs.blob ? (int)ci->i_xattrs.blob->vec.iov_len : 0);
422 if (ci->i_xattrs.index_version >= ci->i_xattrs.version)
423 return 0; /* already built */
425 __ceph_destroy_xattrs(ci);
428 /* updated internal xattr rb tree */
429 if (ci->i_xattrs.blob && ci->i_xattrs.blob->vec.iov_len > 4) {
430 p = ci->i_xattrs.blob->vec.iov_base;
431 end = p + ci->i_xattrs.blob->vec.iov_len;
432 ceph_decode_32_safe(&p, end, numattr, bad);
433 xattr_version = ci->i_xattrs.version;
434 spin_unlock(&ci->i_ceph_lock);
436 xattrs = kcalloc(numattr, sizeof(struct ceph_xattr *),
441 memset(xattrs, 0, numattr*sizeof(struct ceph_xattr *));
442 for (i = 0; i < numattr; i++) {
443 xattrs[i] = kmalloc(sizeof(struct ceph_inode_xattr),
449 spin_lock(&ci->i_ceph_lock);
450 if (ci->i_xattrs.version != xattr_version) {
451 /* lost a race, retry */
452 for (i = 0; i < numattr; i++)
460 ceph_decode_32_safe(&p, end, len, bad);
464 ceph_decode_32_safe(&p, end, len, bad);
468 err = __set_xattr(ci, name, namelen, val, len,
469 0, 0, 0, &xattrs[numattr]);
476 ci->i_xattrs.index_version = ci->i_xattrs.version;
477 ci->i_xattrs.dirty = false;
481 spin_lock(&ci->i_ceph_lock);
484 for (i = 0; i < numattr; i++)
488 ci->i_xattrs.names_size = 0;
492 static int __get_required_blob_size(struct ceph_inode_info *ci, int name_size,
496 * 4 bytes for the length, and additional 4 bytes per each xattr name,
497 * 4 bytes per each value
499 int size = 4 + ci->i_xattrs.count*(4 + 4) +
500 ci->i_xattrs.names_size +
501 ci->i_xattrs.vals_size;
502 dout("__get_required_blob_size c=%d names.size=%d vals.size=%d\n",
503 ci->i_xattrs.count, ci->i_xattrs.names_size,
504 ci->i_xattrs.vals_size);
507 size += 4 + 4 + name_size + val_size;
513 * If there are dirty xattrs, reencode xattrs into the prealloc_blob
514 * and swap into place.
516 void __ceph_build_xattrs_blob(struct ceph_inode_info *ci)
519 struct ceph_inode_xattr *xattr = NULL;
522 dout("__build_xattrs_blob %p\n", &ci->vfs_inode);
523 if (ci->i_xattrs.dirty) {
524 int need = __get_required_blob_size(ci, 0, 0);
526 BUG_ON(need > ci->i_xattrs.prealloc_blob->alloc_len);
528 p = rb_first(&ci->i_xattrs.index);
529 dest = ci->i_xattrs.prealloc_blob->vec.iov_base;
531 ceph_encode_32(&dest, ci->i_xattrs.count);
533 xattr = rb_entry(p, struct ceph_inode_xattr, node);
535 ceph_encode_32(&dest, xattr->name_len);
536 memcpy(dest, xattr->name, xattr->name_len);
537 dest += xattr->name_len;
538 ceph_encode_32(&dest, xattr->val_len);
539 memcpy(dest, xattr->val, xattr->val_len);
540 dest += xattr->val_len;
545 /* adjust buffer len; it may be larger than we need */
546 ci->i_xattrs.prealloc_blob->vec.iov_len =
547 dest - ci->i_xattrs.prealloc_blob->vec.iov_base;
549 if (ci->i_xattrs.blob)
550 ceph_buffer_put(ci->i_xattrs.blob);
551 ci->i_xattrs.blob = ci->i_xattrs.prealloc_blob;
552 ci->i_xattrs.prealloc_blob = NULL;
553 ci->i_xattrs.dirty = false;
554 ci->i_xattrs.version++;
558 ssize_t ceph_getxattr(struct dentry *dentry, const char *name, void *value,
561 struct inode *inode = dentry->d_inode;
562 struct ceph_inode_info *ci = ceph_inode(inode);
564 struct ceph_inode_xattr *xattr;
565 struct ceph_vxattr *vxattr = NULL;
567 if (!ceph_is_valid_xattr(name))
570 /* let's see if a virtual xattr was requested */
571 vxattr = ceph_match_vxattr(inode, name);
573 spin_lock(&ci->i_ceph_lock);
574 dout("getxattr %p ver=%lld index_ver=%lld\n", inode,
575 ci->i_xattrs.version, ci->i_xattrs.index_version);
577 if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) &&
578 (ci->i_xattrs.index_version >= ci->i_xattrs.version)) {
581 spin_unlock(&ci->i_ceph_lock);
582 /* get xattrs from mds (if we don't already have them) */
583 err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR);
588 spin_lock(&ci->i_ceph_lock);
590 if (vxattr && vxattr->readonly) {
591 err = vxattr->getxattr_cb(ci, value, size);
595 err = __build_xattrs(inode);
600 err = -ENODATA; /* == ENOATTR */
601 xattr = __get_xattr(ci, name);
604 err = vxattr->getxattr_cb(ci, value, size);
609 if (size && size < xattr->val_len)
612 err = xattr->val_len;
616 memcpy(value, xattr->val, xattr->val_len);
619 spin_unlock(&ci->i_ceph_lock);
623 ssize_t ceph_listxattr(struct dentry *dentry, char *names, size_t size)
625 struct inode *inode = dentry->d_inode;
626 struct ceph_inode_info *ci = ceph_inode(inode);
627 struct ceph_vxattr *vxattrs = ceph_inode_vxattrs(inode);
634 spin_lock(&ci->i_ceph_lock);
635 dout("listxattr %p ver=%lld index_ver=%lld\n", inode,
636 ci->i_xattrs.version, ci->i_xattrs.index_version);
638 if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) &&
639 (ci->i_xattrs.index_version >= ci->i_xattrs.version)) {
642 spin_unlock(&ci->i_ceph_lock);
643 err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR);
648 spin_lock(&ci->i_ceph_lock);
650 err = __build_xattrs(inode);
656 * Start with virtual dir xattr names (if any) (including
657 * terminating '\0' characters for each).
659 vir_namelen = ceph_vxattrs_name_size(vxattrs);
661 /* adding 1 byte per each variable due to the null termination */
662 namelen = vir_namelen + ci->i_xattrs.names_size + ci->i_xattrs.count;
664 if (size && namelen > size)
671 names = __copy_xattr_names(ci, names);
673 /* virtual xattr names, too */
675 for (i = 0; vxattrs[i].name; i++) {
676 len = sprintf(names, "%s", vxattrs[i].name);
681 spin_unlock(&ci->i_ceph_lock);
685 static int ceph_sync_setxattr(struct dentry *dentry, const char *name,
686 const char *value, size_t size, int flags)
688 struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb);
689 struct inode *inode = dentry->d_inode;
690 struct ceph_inode_info *ci = ceph_inode(inode);
691 struct inode *parent_inode;
692 struct ceph_mds_request *req;
693 struct ceph_mds_client *mdsc = fsc->mdsc;
696 struct page **pages = NULL;
699 /* copy value into some pages */
700 nr_pages = calc_pages_for(0, size);
702 pages = kmalloc(sizeof(pages[0])*nr_pages, GFP_NOFS);
706 for (i = 0; i < nr_pages; i++) {
707 pages[i] = __page_cache_alloc(GFP_NOFS);
712 kaddr = kmap(pages[i]);
713 memcpy(kaddr, value + i*PAGE_CACHE_SIZE,
714 min(PAGE_CACHE_SIZE, size-i*PAGE_CACHE_SIZE));
718 dout("setxattr value=%.*s\n", (int)size, value);
721 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETXATTR,
727 req->r_inode = inode;
729 req->r_inode_drop = CEPH_CAP_XATTR_SHARED;
731 req->r_args.setxattr.flags = cpu_to_le32(flags);
732 req->r_path2 = kstrdup(name, GFP_NOFS);
734 req->r_pages = pages;
735 req->r_num_pages = nr_pages;
736 req->r_data_len = size;
738 dout("xattr.ver (before): %lld\n", ci->i_xattrs.version);
739 parent_inode = ceph_get_dentry_parent_inode(dentry);
740 err = ceph_mdsc_do_request(mdsc, parent_inode, req);
742 ceph_mdsc_put_request(req);
743 dout("xattr.ver (after): %lld\n", ci->i_xattrs.version);
747 for (i = 0; i < nr_pages; i++)
748 __free_page(pages[i]);
754 int ceph_setxattr(struct dentry *dentry, const char *name,
755 const void *value, size_t size, int flags)
757 struct inode *inode = dentry->d_inode;
758 struct ceph_vxattr *vxattr;
759 struct ceph_inode_info *ci = ceph_inode(inode);
763 int name_len = strlen(name);
765 char *newname = NULL;
767 struct ceph_inode_xattr *xattr = NULL;
768 int required_blob_size;
770 if (ceph_snap(inode) != CEPH_NOSNAP)
773 if (!ceph_is_valid_xattr(name))
776 vxattr = ceph_match_vxattr(inode, name);
777 if (vxattr && vxattr->readonly)
780 /* preallocate memory for xattr name, value, index node */
782 newname = kmemdup(name, name_len + 1, GFP_NOFS);
787 newval = kmemdup(value, val_len, GFP_NOFS);
792 xattr = kmalloc(sizeof(struct ceph_inode_xattr), GFP_NOFS);
796 spin_lock(&ci->i_ceph_lock);
798 issued = __ceph_caps_issued(ci, NULL);
799 dout("setxattr %p issued %s\n", inode, ceph_cap_string(issued));
800 if (!(issued & CEPH_CAP_XATTR_EXCL))
802 __build_xattrs(inode);
804 required_blob_size = __get_required_blob_size(ci, name_len, val_len);
806 if (!ci->i_xattrs.prealloc_blob ||
807 required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) {
808 struct ceph_buffer *blob;
810 spin_unlock(&ci->i_ceph_lock);
811 dout(" preaallocating new blob size=%d\n", required_blob_size);
812 blob = ceph_buffer_new(required_blob_size, GFP_NOFS);
815 spin_lock(&ci->i_ceph_lock);
816 if (ci->i_xattrs.prealloc_blob)
817 ceph_buffer_put(ci->i_xattrs.prealloc_blob);
818 ci->i_xattrs.prealloc_blob = blob;
822 err = __set_xattr(ci, newname, name_len, newval,
823 val_len, 1, 1, 1, &xattr);
825 dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL);
826 ci->i_xattrs.dirty = true;
827 inode->i_ctime = CURRENT_TIME;
829 spin_unlock(&ci->i_ceph_lock);
831 __mark_inode_dirty(inode, dirty);
835 spin_unlock(&ci->i_ceph_lock);
836 err = ceph_sync_setxattr(dentry, name, value, size, flags);
844 static int ceph_send_removexattr(struct dentry *dentry, const char *name)
846 struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb);
847 struct ceph_mds_client *mdsc = fsc->mdsc;
848 struct inode *inode = dentry->d_inode;
849 struct inode *parent_inode;
850 struct ceph_mds_request *req;
853 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RMXATTR,
857 req->r_inode = inode;
859 req->r_inode_drop = CEPH_CAP_XATTR_SHARED;
861 req->r_path2 = kstrdup(name, GFP_NOFS);
863 parent_inode = ceph_get_dentry_parent_inode(dentry);
864 err = ceph_mdsc_do_request(mdsc, parent_inode, req);
866 ceph_mdsc_put_request(req);
870 int ceph_removexattr(struct dentry *dentry, const char *name)
872 struct inode *inode = dentry->d_inode;
873 struct ceph_vxattr *vxattr;
874 struct ceph_inode_info *ci = ceph_inode(inode);
877 int required_blob_size;
880 if (ceph_snap(inode) != CEPH_NOSNAP)
883 if (!ceph_is_valid_xattr(name))
886 vxattr = ceph_match_vxattr(inode, name);
887 if (vxattr && vxattr->readonly)
891 spin_lock(&ci->i_ceph_lock);
893 issued = __ceph_caps_issued(ci, NULL);
894 dout("removexattr %p issued %s\n", inode, ceph_cap_string(issued));
896 if (!(issued & CEPH_CAP_XATTR_EXCL))
898 __build_xattrs(inode);
900 required_blob_size = __get_required_blob_size(ci, 0, 0);
902 if (!ci->i_xattrs.prealloc_blob ||
903 required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) {
904 struct ceph_buffer *blob;
906 spin_unlock(&ci->i_ceph_lock);
907 dout(" preaallocating new blob size=%d\n", required_blob_size);
908 blob = ceph_buffer_new(required_blob_size, GFP_NOFS);
911 spin_lock(&ci->i_ceph_lock);
912 if (ci->i_xattrs.prealloc_blob)
913 ceph_buffer_put(ci->i_xattrs.prealloc_blob);
914 ci->i_xattrs.prealloc_blob = blob;
918 err = __remove_xattr_by_name(ceph_inode(inode), name);
920 dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL);
921 ci->i_xattrs.dirty = true;
922 inode->i_ctime = CURRENT_TIME;
923 spin_unlock(&ci->i_ceph_lock);
925 __mark_inode_dirty(inode, dirty);
928 spin_unlock(&ci->i_ceph_lock);
929 err = ceph_send_removexattr(dentry, name);