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/posix_acl_xattr.h>
10 #include <linux/slab.h>
12 #define XATTR_CEPH_PREFIX "ceph."
13 #define XATTR_CEPH_PREFIX_LEN (sizeof (XATTR_CEPH_PREFIX) - 1)
15 static int __remove_xattr(struct ceph_inode_info *ci,
16 struct ceph_inode_xattr *xattr);
19 * List of handlers for synthetic system.* attributes. Other
20 * attributes are handled directly.
22 const struct xattr_handler *ceph_xattr_handlers[] = {
23 #ifdef CONFIG_CEPH_FS_POSIX_ACL
24 &posix_acl_access_xattr_handler,
25 &posix_acl_default_xattr_handler,
30 static bool ceph_is_valid_xattr(const char *name)
32 return !strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN) ||
33 !strncmp(name, XATTR_SECURITY_PREFIX,
34 XATTR_SECURITY_PREFIX_LEN) ||
35 !strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN) ||
36 !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) ||
37 !strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
41 * These define virtual xattrs exposing the recursive directory
42 * statistics and layout metadata.
46 size_t name_size; /* strlen(name) + 1 (for '\0') */
47 size_t (*getxattr_cb)(struct ceph_inode_info *ci, char *val,
49 bool readonly, hidden;
50 bool (*exists_cb)(struct ceph_inode_info *ci);
55 static bool ceph_vxattrcb_layout_exists(struct ceph_inode_info *ci)
58 char *p = (char *)&ci->i_layout;
60 for (s = 0; s < sizeof(ci->i_layout); s++, p++)
66 static size_t ceph_vxattrcb_layout(struct ceph_inode_info *ci, char *val,
70 struct ceph_fs_client *fsc = ceph_sb_to_client(ci->vfs_inode.i_sb);
71 struct ceph_osd_client *osdc = &fsc->client->osdc;
72 s64 pool = ceph_file_layout_pg_pool(ci->i_layout);
73 const char *pool_name;
75 dout("ceph_vxattrcb_layout %p\n", &ci->vfs_inode);
76 down_read(&osdc->map_sem);
77 pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool);
79 ret = snprintf(val, size,
80 "stripe_unit=%lld stripe_count=%lld object_size=%lld pool=%s",
81 (unsigned long long)ceph_file_layout_su(ci->i_layout),
82 (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout),
83 (unsigned long long)ceph_file_layout_object_size(ci->i_layout),
86 ret = snprintf(val, size,
87 "stripe_unit=%lld stripe_count=%lld object_size=%lld pool=%lld",
88 (unsigned long long)ceph_file_layout_su(ci->i_layout),
89 (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout),
90 (unsigned long long)ceph_file_layout_object_size(ci->i_layout),
91 (unsigned long long)pool);
93 up_read(&osdc->map_sem);
97 static size_t ceph_vxattrcb_layout_stripe_unit(struct ceph_inode_info *ci,
98 char *val, size_t size)
100 return snprintf(val, size, "%lld",
101 (unsigned long long)ceph_file_layout_su(ci->i_layout));
104 static size_t ceph_vxattrcb_layout_stripe_count(struct ceph_inode_info *ci,
105 char *val, size_t size)
107 return snprintf(val, size, "%lld",
108 (unsigned long long)ceph_file_layout_stripe_count(ci->i_layout));
111 static size_t ceph_vxattrcb_layout_object_size(struct ceph_inode_info *ci,
112 char *val, size_t size)
114 return snprintf(val, size, "%lld",
115 (unsigned long long)ceph_file_layout_object_size(ci->i_layout));
118 static size_t ceph_vxattrcb_layout_pool(struct ceph_inode_info *ci,
119 char *val, size_t size)
122 struct ceph_fs_client *fsc = ceph_sb_to_client(ci->vfs_inode.i_sb);
123 struct ceph_osd_client *osdc = &fsc->client->osdc;
124 s64 pool = ceph_file_layout_pg_pool(ci->i_layout);
125 const char *pool_name;
127 down_read(&osdc->map_sem);
128 pool_name = ceph_pg_pool_name_by_id(osdc->osdmap, pool);
130 ret = snprintf(val, size, "%s", pool_name);
132 ret = snprintf(val, size, "%lld", (unsigned long long)pool);
133 up_read(&osdc->map_sem);
139 static size_t ceph_vxattrcb_dir_entries(struct ceph_inode_info *ci, char *val,
142 return snprintf(val, size, "%lld", ci->i_files + ci->i_subdirs);
145 static size_t ceph_vxattrcb_dir_files(struct ceph_inode_info *ci, char *val,
148 return snprintf(val, size, "%lld", ci->i_files);
151 static size_t ceph_vxattrcb_dir_subdirs(struct ceph_inode_info *ci, char *val,
154 return snprintf(val, size, "%lld", ci->i_subdirs);
157 static size_t ceph_vxattrcb_dir_rentries(struct ceph_inode_info *ci, char *val,
160 return snprintf(val, size, "%lld", ci->i_rfiles + ci->i_rsubdirs);
163 static size_t ceph_vxattrcb_dir_rfiles(struct ceph_inode_info *ci, char *val,
166 return snprintf(val, size, "%lld", ci->i_rfiles);
169 static size_t ceph_vxattrcb_dir_rsubdirs(struct ceph_inode_info *ci, char *val,
172 return snprintf(val, size, "%lld", ci->i_rsubdirs);
175 static size_t ceph_vxattrcb_dir_rbytes(struct ceph_inode_info *ci, char *val,
178 return snprintf(val, size, "%lld", ci->i_rbytes);
181 static size_t ceph_vxattrcb_dir_rctime(struct ceph_inode_info *ci, char *val,
184 return snprintf(val, size, "%ld.09%ld", (long)ci->i_rctime.tv_sec,
185 (long)ci->i_rctime.tv_nsec);
189 #define CEPH_XATTR_NAME(_type, _name) XATTR_CEPH_PREFIX #_type "." #_name
190 #define CEPH_XATTR_NAME2(_type, _name, _name2) \
191 XATTR_CEPH_PREFIX #_type "." #_name "." #_name2
193 #define XATTR_NAME_CEPH(_type, _name) \
195 .name = CEPH_XATTR_NAME(_type, _name), \
196 .name_size = sizeof (CEPH_XATTR_NAME(_type, _name)), \
197 .getxattr_cb = ceph_vxattrcb_ ## _type ## _ ## _name, \
202 #define XATTR_LAYOUT_FIELD(_type, _name, _field) \
204 .name = CEPH_XATTR_NAME2(_type, _name, _field), \
205 .name_size = sizeof (CEPH_XATTR_NAME2(_type, _name, _field)), \
206 .getxattr_cb = ceph_vxattrcb_ ## _name ## _ ## _field, \
209 .exists_cb = ceph_vxattrcb_layout_exists, \
212 static struct ceph_vxattr ceph_dir_vxattrs[] = {
214 .name = "ceph.dir.layout",
215 .name_size = sizeof("ceph.dir.layout"),
216 .getxattr_cb = ceph_vxattrcb_layout,
219 .exists_cb = ceph_vxattrcb_layout_exists,
221 XATTR_LAYOUT_FIELD(dir, layout, stripe_unit),
222 XATTR_LAYOUT_FIELD(dir, layout, stripe_count),
223 XATTR_LAYOUT_FIELD(dir, layout, object_size),
224 XATTR_LAYOUT_FIELD(dir, layout, pool),
225 XATTR_NAME_CEPH(dir, entries),
226 XATTR_NAME_CEPH(dir, files),
227 XATTR_NAME_CEPH(dir, subdirs),
228 XATTR_NAME_CEPH(dir, rentries),
229 XATTR_NAME_CEPH(dir, rfiles),
230 XATTR_NAME_CEPH(dir, rsubdirs),
231 XATTR_NAME_CEPH(dir, rbytes),
232 XATTR_NAME_CEPH(dir, rctime),
233 { .name = NULL, 0 } /* Required table terminator */
235 static size_t ceph_dir_vxattrs_name_size; /* total size of all names */
239 static struct ceph_vxattr ceph_file_vxattrs[] = {
241 .name = "ceph.file.layout",
242 .name_size = sizeof("ceph.file.layout"),
243 .getxattr_cb = ceph_vxattrcb_layout,
246 .exists_cb = ceph_vxattrcb_layout_exists,
248 XATTR_LAYOUT_FIELD(file, layout, stripe_unit),
249 XATTR_LAYOUT_FIELD(file, layout, stripe_count),
250 XATTR_LAYOUT_FIELD(file, layout, object_size),
251 XATTR_LAYOUT_FIELD(file, layout, pool),
252 { .name = NULL, 0 } /* Required table terminator */
254 static size_t ceph_file_vxattrs_name_size; /* total size of all names */
256 static struct ceph_vxattr *ceph_inode_vxattrs(struct inode *inode)
258 if (S_ISDIR(inode->i_mode))
259 return ceph_dir_vxattrs;
260 else if (S_ISREG(inode->i_mode))
261 return ceph_file_vxattrs;
265 static size_t ceph_vxattrs_name_size(struct ceph_vxattr *vxattrs)
267 if (vxattrs == ceph_dir_vxattrs)
268 return ceph_dir_vxattrs_name_size;
269 if (vxattrs == ceph_file_vxattrs)
270 return ceph_file_vxattrs_name_size;
277 * Compute the aggregate size (including terminating '\0') of all
278 * virtual extended attribute names in the given vxattr table.
280 static size_t __init vxattrs_name_size(struct ceph_vxattr *vxattrs)
282 struct ceph_vxattr *vxattr;
285 for (vxattr = vxattrs; vxattr->name; vxattr++)
287 size += vxattr->name_size;
292 /* Routines called at initialization and exit time */
294 void __init ceph_xattr_init(void)
296 ceph_dir_vxattrs_name_size = vxattrs_name_size(ceph_dir_vxattrs);
297 ceph_file_vxattrs_name_size = vxattrs_name_size(ceph_file_vxattrs);
300 void ceph_xattr_exit(void)
302 ceph_dir_vxattrs_name_size = 0;
303 ceph_file_vxattrs_name_size = 0;
306 static struct ceph_vxattr *ceph_match_vxattr(struct inode *inode,
309 struct ceph_vxattr *vxattr = ceph_inode_vxattrs(inode);
312 while (vxattr->name) {
313 if (!strcmp(vxattr->name, name))
322 static int __set_xattr(struct ceph_inode_info *ci,
323 const char *name, int name_len,
324 const char *val, int val_len,
325 int flags, int update_xattr,
326 struct ceph_inode_xattr **newxattr)
329 struct rb_node *parent = NULL;
330 struct ceph_inode_xattr *xattr = NULL;
334 p = &ci->i_xattrs.index.rb_node;
337 xattr = rb_entry(parent, struct ceph_inode_xattr, node);
338 c = strncmp(name, xattr->name, min(name_len, xattr->name_len));
344 if (name_len == xattr->name_len)
346 else if (name_len < xattr->name_len)
356 if (xattr && (flags & XATTR_CREATE))
358 else if (!xattr && (flags & XATTR_REPLACE))
365 if (update_xattr < 0) {
367 __remove_xattr(ci, xattr);
377 xattr->name_len = name_len;
378 xattr->should_free_name = update_xattr;
380 ci->i_xattrs.count++;
381 dout("__set_xattr count=%d\n", ci->i_xattrs.count);
385 if (xattr->should_free_val)
386 kfree((void *)xattr->val);
392 ci->i_xattrs.names_size -= xattr->name_len;
393 ci->i_xattrs.vals_size -= xattr->val_len;
395 ci->i_xattrs.names_size += name_len;
396 ci->i_xattrs.vals_size += val_len;
402 xattr->val_len = val_len;
403 xattr->dirty = update_xattr;
404 xattr->should_free_val = (val && update_xattr);
407 rb_link_node(&xattr->node, parent, p);
408 rb_insert_color(&xattr->node, &ci->i_xattrs.index);
409 dout("__set_xattr_val p=%p\n", p);
412 dout("__set_xattr_val added %llx.%llx xattr %p %s=%.*s\n",
413 ceph_vinop(&ci->vfs_inode), xattr, name, val_len, val);
418 static struct ceph_inode_xattr *__get_xattr(struct ceph_inode_info *ci,
422 struct rb_node *parent = NULL;
423 struct ceph_inode_xattr *xattr = NULL;
424 int name_len = strlen(name);
427 p = &ci->i_xattrs.index.rb_node;
430 xattr = rb_entry(parent, struct ceph_inode_xattr, node);
431 c = strncmp(name, xattr->name, xattr->name_len);
432 if (c == 0 && name_len > xattr->name_len)
439 dout("__get_xattr %s: found %.*s\n", name,
440 xattr->val_len, xattr->val);
445 dout("__get_xattr %s: not found\n", name);
450 static void __free_xattr(struct ceph_inode_xattr *xattr)
454 if (xattr->should_free_name)
455 kfree((void *)xattr->name);
456 if (xattr->should_free_val)
457 kfree((void *)xattr->val);
462 static int __remove_xattr(struct ceph_inode_info *ci,
463 struct ceph_inode_xattr *xattr)
468 rb_erase(&xattr->node, &ci->i_xattrs.index);
470 if (xattr->should_free_name)
471 kfree((void *)xattr->name);
472 if (xattr->should_free_val)
473 kfree((void *)xattr->val);
475 ci->i_xattrs.names_size -= xattr->name_len;
476 ci->i_xattrs.vals_size -= xattr->val_len;
477 ci->i_xattrs.count--;
483 static int __remove_xattr_by_name(struct ceph_inode_info *ci,
487 struct ceph_inode_xattr *xattr;
490 p = &ci->i_xattrs.index.rb_node;
491 xattr = __get_xattr(ci, name);
492 err = __remove_xattr(ci, xattr);
496 static char *__copy_xattr_names(struct ceph_inode_info *ci,
500 struct ceph_inode_xattr *xattr = NULL;
502 p = rb_first(&ci->i_xattrs.index);
503 dout("__copy_xattr_names count=%d\n", ci->i_xattrs.count);
506 xattr = rb_entry(p, struct ceph_inode_xattr, node);
507 memcpy(dest, xattr->name, xattr->name_len);
508 dest[xattr->name_len] = '\0';
510 dout("dest=%s %p (%s) (%d/%d)\n", dest, xattr, xattr->name,
511 xattr->name_len, ci->i_xattrs.names_size);
513 dest += xattr->name_len + 1;
520 void __ceph_destroy_xattrs(struct ceph_inode_info *ci)
522 struct rb_node *p, *tmp;
523 struct ceph_inode_xattr *xattr = NULL;
525 p = rb_first(&ci->i_xattrs.index);
527 dout("__ceph_destroy_xattrs p=%p\n", p);
530 xattr = rb_entry(p, struct ceph_inode_xattr, node);
533 dout("__ceph_destroy_xattrs next p=%p (%.*s)\n", p,
534 xattr->name_len, xattr->name);
535 rb_erase(tmp, &ci->i_xattrs.index);
540 ci->i_xattrs.names_size = 0;
541 ci->i_xattrs.vals_size = 0;
542 ci->i_xattrs.index_version = 0;
543 ci->i_xattrs.count = 0;
544 ci->i_xattrs.index = RB_ROOT;
547 static int __build_xattrs(struct inode *inode)
548 __releases(ci->i_ceph_lock)
549 __acquires(ci->i_ceph_lock)
555 const char *name, *val;
556 struct ceph_inode_info *ci = ceph_inode(inode);
558 struct ceph_inode_xattr **xattrs = NULL;
562 dout("__build_xattrs() len=%d\n",
563 ci->i_xattrs.blob ? (int)ci->i_xattrs.blob->vec.iov_len : 0);
565 if (ci->i_xattrs.index_version >= ci->i_xattrs.version)
566 return 0; /* already built */
568 __ceph_destroy_xattrs(ci);
571 /* updated internal xattr rb tree */
572 if (ci->i_xattrs.blob && ci->i_xattrs.blob->vec.iov_len > 4) {
573 p = ci->i_xattrs.blob->vec.iov_base;
574 end = p + ci->i_xattrs.blob->vec.iov_len;
575 ceph_decode_32_safe(&p, end, numattr, bad);
576 xattr_version = ci->i_xattrs.version;
577 spin_unlock(&ci->i_ceph_lock);
579 xattrs = kcalloc(numattr, sizeof(struct ceph_xattr *),
584 memset(xattrs, 0, numattr*sizeof(struct ceph_xattr *));
585 for (i = 0; i < numattr; i++) {
586 xattrs[i] = kmalloc(sizeof(struct ceph_inode_xattr),
592 spin_lock(&ci->i_ceph_lock);
593 if (ci->i_xattrs.version != xattr_version) {
594 /* lost a race, retry */
595 for (i = 0; i < numattr; i++)
603 ceph_decode_32_safe(&p, end, len, bad);
607 ceph_decode_32_safe(&p, end, len, bad);
611 err = __set_xattr(ci, name, namelen, val, len,
612 0, 0, &xattrs[numattr]);
619 ci->i_xattrs.index_version = ci->i_xattrs.version;
620 ci->i_xattrs.dirty = false;
624 spin_lock(&ci->i_ceph_lock);
627 for (i = 0; i < numattr; i++)
631 ci->i_xattrs.names_size = 0;
635 static int __get_required_blob_size(struct ceph_inode_info *ci, int name_size,
639 * 4 bytes for the length, and additional 4 bytes per each xattr name,
640 * 4 bytes per each value
642 int size = 4 + ci->i_xattrs.count*(4 + 4) +
643 ci->i_xattrs.names_size +
644 ci->i_xattrs.vals_size;
645 dout("__get_required_blob_size c=%d names.size=%d vals.size=%d\n",
646 ci->i_xattrs.count, ci->i_xattrs.names_size,
647 ci->i_xattrs.vals_size);
650 size += 4 + 4 + name_size + val_size;
656 * If there are dirty xattrs, reencode xattrs into the prealloc_blob
657 * and swap into place.
659 void __ceph_build_xattrs_blob(struct ceph_inode_info *ci)
662 struct ceph_inode_xattr *xattr = NULL;
665 dout("__build_xattrs_blob %p\n", &ci->vfs_inode);
666 if (ci->i_xattrs.dirty) {
667 int need = __get_required_blob_size(ci, 0, 0);
669 BUG_ON(need > ci->i_xattrs.prealloc_blob->alloc_len);
671 p = rb_first(&ci->i_xattrs.index);
672 dest = ci->i_xattrs.prealloc_blob->vec.iov_base;
674 ceph_encode_32(&dest, ci->i_xattrs.count);
676 xattr = rb_entry(p, struct ceph_inode_xattr, node);
678 ceph_encode_32(&dest, xattr->name_len);
679 memcpy(dest, xattr->name, xattr->name_len);
680 dest += xattr->name_len;
681 ceph_encode_32(&dest, xattr->val_len);
682 memcpy(dest, xattr->val, xattr->val_len);
683 dest += xattr->val_len;
688 /* adjust buffer len; it may be larger than we need */
689 ci->i_xattrs.prealloc_blob->vec.iov_len =
690 dest - ci->i_xattrs.prealloc_blob->vec.iov_base;
692 if (ci->i_xattrs.blob)
693 ceph_buffer_put(ci->i_xattrs.blob);
694 ci->i_xattrs.blob = ci->i_xattrs.prealloc_blob;
695 ci->i_xattrs.prealloc_blob = NULL;
696 ci->i_xattrs.dirty = false;
697 ci->i_xattrs.version++;
701 ssize_t __ceph_getxattr(struct inode *inode, const char *name, void *value,
704 struct ceph_inode_info *ci = ceph_inode(inode);
706 struct ceph_inode_xattr *xattr;
707 struct ceph_vxattr *vxattr = NULL;
709 if (!ceph_is_valid_xattr(name))
712 /* let's see if a virtual xattr was requested */
713 vxattr = ceph_match_vxattr(inode, name);
714 if (vxattr && !(vxattr->exists_cb && !vxattr->exists_cb(ci))) {
715 err = vxattr->getxattr_cb(ci, value, size);
719 spin_lock(&ci->i_ceph_lock);
720 dout("getxattr %p ver=%lld index_ver=%lld\n", inode,
721 ci->i_xattrs.version, ci->i_xattrs.index_version);
723 if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) &&
724 (ci->i_xattrs.index_version >= ci->i_xattrs.version)) {
727 spin_unlock(&ci->i_ceph_lock);
728 /* get xattrs from mds (if we don't already have them) */
729 err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR);
734 spin_lock(&ci->i_ceph_lock);
736 err = __build_xattrs(inode);
741 err = -ENODATA; /* == ENOATTR */
742 xattr = __get_xattr(ci, name);
747 if (size && size < xattr->val_len)
750 err = xattr->val_len;
754 memcpy(value, xattr->val, xattr->val_len);
757 spin_unlock(&ci->i_ceph_lock);
761 ssize_t ceph_getxattr(struct dentry *dentry, const char *name, void *value,
764 if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
765 return generic_getxattr(dentry, name, value, size);
767 return __ceph_getxattr(dentry->d_inode, name, value, size);
770 ssize_t ceph_listxattr(struct dentry *dentry, char *names, size_t size)
772 struct inode *inode = dentry->d_inode;
773 struct ceph_inode_info *ci = ceph_inode(inode);
774 struct ceph_vxattr *vxattrs = ceph_inode_vxattrs(inode);
781 spin_lock(&ci->i_ceph_lock);
782 dout("listxattr %p ver=%lld index_ver=%lld\n", inode,
783 ci->i_xattrs.version, ci->i_xattrs.index_version);
785 if (__ceph_caps_issued_mask(ci, CEPH_CAP_XATTR_SHARED, 1) &&
786 (ci->i_xattrs.index_version >= ci->i_xattrs.version)) {
789 spin_unlock(&ci->i_ceph_lock);
790 err = ceph_do_getattr(inode, CEPH_STAT_CAP_XATTR);
795 spin_lock(&ci->i_ceph_lock);
797 err = __build_xattrs(inode);
803 * Start with virtual dir xattr names (if any) (including
804 * terminating '\0' characters for each).
806 vir_namelen = ceph_vxattrs_name_size(vxattrs);
808 /* adding 1 byte per each variable due to the null termination */
809 namelen = ci->i_xattrs.names_size + ci->i_xattrs.count;
811 if (size && vir_namelen + namelen > size)
814 err = namelen + vir_namelen;
818 names = __copy_xattr_names(ci, names);
820 /* virtual xattr names, too */
823 for (i = 0; vxattrs[i].name; i++) {
824 if (!vxattrs[i].hidden &&
825 !(vxattrs[i].exists_cb &&
826 !vxattrs[i].exists_cb(ci))) {
827 len = sprintf(names, "%s", vxattrs[i].name);
835 spin_unlock(&ci->i_ceph_lock);
839 static int ceph_sync_setxattr(struct dentry *dentry, const char *name,
840 const char *value, size_t size, int flags)
842 struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb);
843 struct inode *inode = dentry->d_inode;
844 struct ceph_inode_info *ci = ceph_inode(inode);
845 struct inode *parent_inode;
846 struct ceph_mds_request *req;
847 struct ceph_mds_client *mdsc = fsc->mdsc;
850 struct page **pages = NULL;
853 /* copy value into some pages */
854 nr_pages = calc_pages_for(0, size);
856 pages = kmalloc(sizeof(pages[0])*nr_pages, GFP_NOFS);
860 for (i = 0; i < nr_pages; i++) {
861 pages[i] = __page_cache_alloc(GFP_NOFS);
866 kaddr = kmap(pages[i]);
867 memcpy(kaddr, value + i*PAGE_CACHE_SIZE,
868 min(PAGE_CACHE_SIZE, size-i*PAGE_CACHE_SIZE));
872 dout("setxattr value=%.*s\n", (int)size, value);
875 flags |= CEPH_XATTR_REMOVE;
878 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETXATTR,
884 req->r_inode = inode;
886 req->r_inode_drop = CEPH_CAP_XATTR_SHARED;
888 req->r_args.setxattr.flags = cpu_to_le32(flags);
889 req->r_path2 = kstrdup(name, GFP_NOFS);
891 req->r_pages = pages;
892 req->r_num_pages = nr_pages;
893 req->r_data_len = size;
895 dout("xattr.ver (before): %lld\n", ci->i_xattrs.version);
896 parent_inode = ceph_get_dentry_parent_inode(dentry);
897 err = ceph_mdsc_do_request(mdsc, parent_inode, req);
899 ceph_mdsc_put_request(req);
900 dout("xattr.ver (after): %lld\n", ci->i_xattrs.version);
904 for (i = 0; i < nr_pages; i++)
905 __free_page(pages[i]);
911 int __ceph_setxattr(struct dentry *dentry, const char *name,
912 const void *value, size_t size, int flags)
914 struct inode *inode = dentry->d_inode;
915 struct ceph_vxattr *vxattr;
916 struct ceph_inode_info *ci = ceph_inode(inode);
920 int name_len = strlen(name);
922 char *newname = NULL;
924 struct ceph_inode_xattr *xattr = NULL;
925 int required_blob_size;
927 if (!ceph_is_valid_xattr(name))
930 vxattr = ceph_match_vxattr(inode, name);
931 if (vxattr && vxattr->readonly)
934 /* pass any unhandled ceph.* xattrs through to the MDS */
935 if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN))
936 goto do_sync_unlocked;
938 /* preallocate memory for xattr name, value, index node */
940 newname = kmemdup(name, name_len + 1, GFP_NOFS);
945 newval = kmemdup(value, val_len, GFP_NOFS);
950 xattr = kmalloc(sizeof(struct ceph_inode_xattr), GFP_NOFS);
954 spin_lock(&ci->i_ceph_lock);
956 issued = __ceph_caps_issued(ci, NULL);
957 dout("setxattr %p issued %s\n", inode, ceph_cap_string(issued));
958 if (!(issued & CEPH_CAP_XATTR_EXCL))
960 __build_xattrs(inode);
962 required_blob_size = __get_required_blob_size(ci, name_len, val_len);
964 if (!ci->i_xattrs.prealloc_blob ||
965 required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) {
966 struct ceph_buffer *blob;
968 spin_unlock(&ci->i_ceph_lock);
969 dout(" preaallocating new blob size=%d\n", required_blob_size);
970 blob = ceph_buffer_new(required_blob_size, GFP_NOFS);
973 spin_lock(&ci->i_ceph_lock);
974 if (ci->i_xattrs.prealloc_blob)
975 ceph_buffer_put(ci->i_xattrs.prealloc_blob);
976 ci->i_xattrs.prealloc_blob = blob;
980 err = __set_xattr(ci, newname, name_len, newval, val_len,
981 flags, value ? 1 : -1, &xattr);
984 dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL);
985 ci->i_xattrs.dirty = true;
986 inode->i_ctime = CURRENT_TIME;
989 spin_unlock(&ci->i_ceph_lock);
991 __mark_inode_dirty(inode, dirty);
995 spin_unlock(&ci->i_ceph_lock);
997 err = ceph_sync_setxattr(dentry, name, value, size, flags);
1005 int ceph_setxattr(struct dentry *dentry, const char *name,
1006 const void *value, size_t size, int flags)
1008 if (ceph_snap(dentry->d_inode) != CEPH_NOSNAP)
1011 if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
1012 return generic_setxattr(dentry, name, value, size, flags);
1014 return __ceph_setxattr(dentry, name, value, size, flags);
1017 static int ceph_send_removexattr(struct dentry *dentry, const char *name)
1019 struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb);
1020 struct ceph_mds_client *mdsc = fsc->mdsc;
1021 struct inode *inode = dentry->d_inode;
1022 struct inode *parent_inode;
1023 struct ceph_mds_request *req;
1026 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_RMXATTR,
1029 return PTR_ERR(req);
1030 req->r_inode = inode;
1032 req->r_inode_drop = CEPH_CAP_XATTR_SHARED;
1033 req->r_num_caps = 1;
1034 req->r_path2 = kstrdup(name, GFP_NOFS);
1036 parent_inode = ceph_get_dentry_parent_inode(dentry);
1037 err = ceph_mdsc_do_request(mdsc, parent_inode, req);
1039 ceph_mdsc_put_request(req);
1043 int __ceph_removexattr(struct dentry *dentry, const char *name)
1045 struct inode *inode = dentry->d_inode;
1046 struct ceph_vxattr *vxattr;
1047 struct ceph_inode_info *ci = ceph_inode(inode);
1050 int required_blob_size;
1053 if (!ceph_is_valid_xattr(name))
1056 vxattr = ceph_match_vxattr(inode, name);
1057 if (vxattr && vxattr->readonly)
1060 /* pass any unhandled ceph.* xattrs through to the MDS */
1061 if (!strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN))
1062 goto do_sync_unlocked;
1065 spin_lock(&ci->i_ceph_lock);
1067 issued = __ceph_caps_issued(ci, NULL);
1068 dout("removexattr %p issued %s\n", inode, ceph_cap_string(issued));
1070 if (!(issued & CEPH_CAP_XATTR_EXCL))
1072 __build_xattrs(inode);
1074 required_blob_size = __get_required_blob_size(ci, 0, 0);
1076 if (!ci->i_xattrs.prealloc_blob ||
1077 required_blob_size > ci->i_xattrs.prealloc_blob->alloc_len) {
1078 struct ceph_buffer *blob;
1080 spin_unlock(&ci->i_ceph_lock);
1081 dout(" preaallocating new blob size=%d\n", required_blob_size);
1082 blob = ceph_buffer_new(required_blob_size, GFP_NOFS);
1085 spin_lock(&ci->i_ceph_lock);
1086 if (ci->i_xattrs.prealloc_blob)
1087 ceph_buffer_put(ci->i_xattrs.prealloc_blob);
1088 ci->i_xattrs.prealloc_blob = blob;
1092 err = __remove_xattr_by_name(ceph_inode(inode), name);
1094 dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_XATTR_EXCL);
1095 ci->i_xattrs.dirty = true;
1096 inode->i_ctime = CURRENT_TIME;
1097 spin_unlock(&ci->i_ceph_lock);
1099 __mark_inode_dirty(inode, dirty);
1102 spin_unlock(&ci->i_ceph_lock);
1104 err = ceph_send_removexattr(dentry, name);
1109 int ceph_removexattr(struct dentry *dentry, const char *name)
1111 if (ceph_snap(dentry->d_inode) != CEPH_NOSNAP)
1114 if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
1115 return generic_removexattr(dentry, name);
1117 return __ceph_removexattr(dentry, name);