Lines Matching +full:name +full:- +full:prefix

1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2017-2018 HUAWEI, Inc.
5 * Copyright (C) 2021-2022, Alibaba Cloud
22 struct qstr name; member
34 struct super_block *sb = inode->i_sb; in erofs_init_inode_xattrs()
38 if (test_bit(EROFS_I_EA_INITED_BIT, &vi->flags)) { in erofs_init_inode_xattrs()
47 if (wait_on_bit_lock(&vi->flags, EROFS_I_BL_XATTR_BIT, TASK_KILLABLE)) in erofs_init_inode_xattrs()
48 return -ERESTARTSYS; in erofs_init_inode_xattrs()
51 if (test_bit(EROFS_I_EA_INITED_BIT, &vi->flags)) in erofs_init_inode_xattrs()
55 * bypass all xattr operations if ->xattr_isize is not greater than in erofs_init_inode_xattrs()
58 * ->xattr_isize should be 0 (it means no xattr); in erofs_init_inode_xattrs()
59 * 2) it is just to contain erofs_xattr_ibody_header, which is on-disk in erofs_init_inode_xattrs()
62 if (vi->xattr_isize == sizeof(struct erofs_xattr_ibody_header)) { in erofs_init_inode_xattrs()
65 vi->xattr_isize, vi->nid); in erofs_init_inode_xattrs()
66 ret = -EOPNOTSUPP; in erofs_init_inode_xattrs()
68 } else if (vi->xattr_isize < sizeof(struct erofs_xattr_ibody_header)) { in erofs_init_inode_xattrs()
69 if (vi->xattr_isize) { in erofs_init_inode_xattrs()
70 erofs_err(sb, "bogus xattr ibody @ nid %llu", vi->nid); in erofs_init_inode_xattrs()
72 ret = -EFSCORRUPTED; in erofs_init_inode_xattrs()
75 ret = -ENOATTR; in erofs_init_inode_xattrs()
81 it.pos = erofs_iloc(inode) + vi->inode_isize; in erofs_init_inode_xattrs()
83 /* read in shared xattr array (non-atomic, see kmalloc below) */ in erofs_init_inode_xattrs()
91 vi->xattr_name_filter = le32_to_cpu(ih->h_name_filter); in erofs_init_inode_xattrs()
92 vi->xattr_shared_count = ih->h_shared_count; in erofs_init_inode_xattrs()
93 vi->xattr_shared_xattrs = kmalloc_array(vi->xattr_shared_count, in erofs_init_inode_xattrs()
95 if (!vi->xattr_shared_xattrs) { in erofs_init_inode_xattrs()
97 ret = -ENOMEM; in erofs_init_inode_xattrs()
104 for (i = 0; i < vi->xattr_shared_count; ++i) { in erofs_init_inode_xattrs()
108 kfree(vi->xattr_shared_xattrs); in erofs_init_inode_xattrs()
109 vi->xattr_shared_xattrs = NULL; in erofs_init_inode_xattrs()
113 vi->xattr_shared_xattrs[i] = le32_to_cpu(*(__le32 *) in erofs_init_inode_xattrs()
121 set_bit(EROFS_I_EA_INITED_BIT, &vi->flags); in erofs_init_inode_xattrs()
124 clear_and_wake_up_bit(EROFS_I_BL_XATTR_BIT, &vi->flags); in erofs_init_inode_xattrs()
130 return test_opt(&EROFS_SB(dentry->d_sb)->opt, XATTR_USER); in erofs_xattr_user_list()
140 const char *name, void *buffer, size_t size) in erofs_xattr_generic_get() argument
142 if (handler->flags == EROFS_XATTR_INDEX_USER && in erofs_xattr_generic_get()
143 !test_opt(&EROFS_I_SB(inode)->opt, XATTR_USER)) in erofs_xattr_generic_get()
144 return -EOPNOTSUPP; in erofs_xattr_generic_get()
146 return erofs_getxattr(inode, handler->flags, name, buffer, size); in erofs_xattr_generic_get()
150 .prefix = XATTR_USER_PREFIX,
157 .prefix = XATTR_TRUSTED_PREFIX,
165 .prefix = XATTR_SECURITY_PREFIX,
184 struct super_block *sb = it->sb; in erofs_xattr_copy_to_buffer()
188 it->kaddr = erofs_bread(&it->buf, erofs_blknr(sb, it->pos), in erofs_xattr_copy_to_buffer()
190 if (IS_ERR(it->kaddr)) in erofs_xattr_copy_to_buffer()
191 return PTR_ERR(it->kaddr); in erofs_xattr_copy_to_buffer()
193 src = it->kaddr + erofs_blkoff(sb, it->pos); in erofs_xattr_copy_to_buffer()
194 slice = min_t(unsigned int, sb->s_blocksize - in erofs_xattr_copy_to_buffer()
195 erofs_blkoff(sb, it->pos), len - processed); in erofs_xattr_copy_to_buffer()
196 memcpy(it->buffer + it->buffer_ofs, src, slice); in erofs_xattr_copy_to_buffer()
197 it->buffer_ofs += slice; in erofs_xattr_copy_to_buffer()
198 it->pos += slice; in erofs_xattr_copy_to_buffer()
207 const char *prefix, *infix = NULL; in erofs_listxattr_foreach() local
212 (it->kaddr + erofs_blkoff(it->sb, it->pos)); in erofs_listxattr_foreach()
213 it->pos += sizeof(struct erofs_xattr_entry); in erofs_listxattr_foreach()
217 struct erofs_sb_info *sbi = EROFS_SB(it->sb); in erofs_listxattr_foreach()
218 struct erofs_xattr_prefix_item *pf = sbi->xattr_prefixes + in erofs_listxattr_foreach()
221 if (pf >= sbi->xattr_prefixes + sbi->xattr_prefix_count) in erofs_listxattr_foreach()
223 infix = pf->prefix->infix; in erofs_listxattr_foreach()
224 infix_len = pf->infix_len; in erofs_listxattr_foreach()
225 base_index = pf->prefix->base_index; in erofs_listxattr_foreach()
228 prefix = erofs_xattr_prefix(base_index, it->dentry); in erofs_listxattr_foreach()
229 if (!prefix) in erofs_listxattr_foreach()
231 prefix_len = strlen(prefix); in erofs_listxattr_foreach()
234 if (!it->buffer) { in erofs_listxattr_foreach()
235 it->buffer_ofs += name_total; in erofs_listxattr_foreach()
239 if (it->buffer_ofs + name_total > it->buffer_size) in erofs_listxattr_foreach()
240 return -ERANGE; in erofs_listxattr_foreach()
242 memcpy(it->buffer + it->buffer_ofs, prefix, prefix_len); in erofs_listxattr_foreach()
243 memcpy(it->buffer + it->buffer_ofs + prefix_len, infix, infix_len); in erofs_listxattr_foreach()
244 it->buffer_ofs += prefix_len + infix_len; in erofs_listxattr_foreach()
246 /* 2. handle xattr name */ in erofs_listxattr_foreach()
251 it->buffer[it->buffer_ofs++] = '\0'; in erofs_listxattr_foreach()
257 struct super_block *sb = it->sb; in erofs_getxattr_foreach()
263 (it->kaddr + erofs_blkoff(sb, it->pos)); in erofs_getxattr_foreach()
264 it->pos += sizeof(struct erofs_xattr_entry); in erofs_getxattr_foreach()
267 /* should also match the infix for long name prefixes */ in erofs_getxattr_foreach()
270 struct erofs_xattr_prefix_item *pf = sbi->xattr_prefixes + in erofs_getxattr_foreach()
273 if (pf >= sbi->xattr_prefixes + sbi->xattr_prefix_count) in erofs_getxattr_foreach()
274 return -ENOATTR; in erofs_getxattr_foreach()
276 if (it->index != pf->prefix->base_index || in erofs_getxattr_foreach()
277 it->name.len != entry.e_name_len + pf->infix_len) in erofs_getxattr_foreach()
278 return -ENOATTR; in erofs_getxattr_foreach()
280 if (memcmp(it->name.name, pf->prefix->infix, pf->infix_len)) in erofs_getxattr_foreach()
281 return -ENOATTR; in erofs_getxattr_foreach()
283 it->infix_len = pf->infix_len; in erofs_getxattr_foreach()
285 if (it->index != entry.e_name_index || in erofs_getxattr_foreach()
286 it->name.len != entry.e_name_len) in erofs_getxattr_foreach()
287 return -ENOATTR; in erofs_getxattr_foreach()
289 it->infix_len = 0; in erofs_getxattr_foreach()
292 /* 2. handle xattr name */ in erofs_getxattr_foreach()
294 it->kaddr = erofs_bread(&it->buf, erofs_blknr(sb, it->pos), in erofs_getxattr_foreach()
296 if (IS_ERR(it->kaddr)) in erofs_getxattr_foreach()
297 return PTR_ERR(it->kaddr); in erofs_getxattr_foreach()
300 sb->s_blocksize - erofs_blkoff(sb, it->pos), in erofs_getxattr_foreach()
301 entry.e_name_len - processed); in erofs_getxattr_foreach()
302 if (memcmp(it->name.name + it->infix_len + processed, in erofs_getxattr_foreach()
303 it->kaddr + erofs_blkoff(sb, it->pos), slice)) in erofs_getxattr_foreach()
304 return -ENOATTR; in erofs_getxattr_foreach()
305 it->pos += slice; in erofs_getxattr_foreach()
309 if (!it->buffer) { in erofs_getxattr_foreach()
310 it->buffer_ofs = value_sz; in erofs_getxattr_foreach()
314 if (it->buffer_size < value_sz) in erofs_getxattr_foreach()
315 return -ERANGE; in erofs_getxattr_foreach()
329 sizeof(u32) * vi->xattr_shared_count; in erofs_xattr_iter_inline()
330 if (xattr_header_sz >= vi->xattr_isize) { in erofs_xattr_iter_inline()
331 DBG_BUGON(xattr_header_sz > vi->xattr_isize); in erofs_xattr_iter_inline()
332 return -ENOATTR; in erofs_xattr_iter_inline()
335 remaining = vi->xattr_isize - xattr_header_sz; in erofs_xattr_iter_inline()
336 it->pos = erofs_iloc(inode) + vi->inode_isize + xattr_header_sz; in erofs_xattr_iter_inline()
339 it->kaddr = erofs_bread(&it->buf, erofs_blknr(it->sb, it->pos), in erofs_xattr_iter_inline()
341 if (IS_ERR(it->kaddr)) in erofs_xattr_iter_inline()
342 return PTR_ERR(it->kaddr); in erofs_xattr_iter_inline()
344 entry_sz = erofs_xattr_entry_size(it->kaddr + in erofs_xattr_iter_inline()
345 erofs_blkoff(it->sb, it->pos)); in erofs_xattr_iter_inline()
346 /* xattr on-disk corruption: xattr entry beyond xattr_isize */ in erofs_xattr_iter_inline()
349 return -EFSCORRUPTED; in erofs_xattr_iter_inline()
351 remaining -= entry_sz; in erofs_xattr_iter_inline()
352 next_pos = it->pos + entry_sz; in erofs_xattr_iter_inline()
358 if ((getxattr && ret != -ENOATTR) || (!getxattr && ret)) in erofs_xattr_iter_inline()
361 it->pos = next_pos; in erofs_xattr_iter_inline()
370 struct super_block *const sb = it->sb; in erofs_xattr_iter_shared()
373 int ret = -ENOATTR; in erofs_xattr_iter_shared()
375 for (i = 0; i < vi->xattr_shared_count; ++i) { in erofs_xattr_iter_shared()
376 it->pos = erofs_pos(sb, sbi->xattr_blkaddr) + in erofs_xattr_iter_shared()
377 vi->xattr_shared_xattrs[i] * sizeof(__le32); in erofs_xattr_iter_shared()
378 it->kaddr = erofs_bread(&it->buf, erofs_blknr(sb, it->pos), in erofs_xattr_iter_shared()
380 if (IS_ERR(it->kaddr)) in erofs_xattr_iter_shared()
381 return PTR_ERR(it->kaddr); in erofs_xattr_iter_shared()
387 if ((getxattr && ret != -ENOATTR) || (!getxattr && ret)) in erofs_xattr_iter_shared()
393 int erofs_getxattr(struct inode *inode, int index, const char *name, in erofs_getxattr() argument
400 struct erofs_sb_info *sbi = EROFS_SB(inode->i_sb); in erofs_getxattr()
402 if (!name) in erofs_getxattr()
403 return -EINVAL; in erofs_getxattr()
409 /* reserved flag is non-zero if there's any change of on-disk format */ in erofs_getxattr()
410 if (erofs_sb_has_xattr_filter(sbi) && !sbi->xattr_filter_reserved) { in erofs_getxattr()
411 hashbit = xxh32(name, strlen(name), in erofs_getxattr()
413 hashbit &= EROFS_XATTR_FILTER_BITS - 1; in erofs_getxattr()
414 if (vi->xattr_name_filter & (1U << hashbit)) in erofs_getxattr()
415 return -ENOATTR; in erofs_getxattr()
419 it.name = (struct qstr)QSTR_INIT(name, strlen(name)); in erofs_getxattr()
420 if (it.name.len > EROFS_NAME_LEN) in erofs_getxattr()
421 return -ERANGE; in erofs_getxattr()
423 it.sb = inode->i_sb; in erofs_getxattr()
431 if (ret == -ENOATTR) in erofs_getxattr()
444 if (ret == -ENOATTR) in erofs_listxattr()
449 it.sb = dentry->d_sb; in erofs_listxattr()
458 if (!ret || ret == -ENOATTR) in erofs_listxattr()
460 if (ret == -ENOATTR) in erofs_listxattr()
471 if (sbi->xattr_prefixes) { in erofs_xattr_prefixes_cleanup()
472 for (i = 0; i < sbi->xattr_prefix_count; i++) in erofs_xattr_prefixes_cleanup()
473 kfree(sbi->xattr_prefixes[i].prefix); in erofs_xattr_prefixes_cleanup()
474 kfree(sbi->xattr_prefixes); in erofs_xattr_prefixes_cleanup()
475 sbi->xattr_prefixes = NULL; in erofs_xattr_prefixes_cleanup()
483 erofs_off_t pos = (erofs_off_t)sbi->xattr_prefix_start << 2; in erofs_xattr_prefixes_init()
487 if (!sbi->xattr_prefix_count) in erofs_xattr_prefixes_init()
490 pfs = kzalloc(sbi->xattr_prefix_count * sizeof(*pfs), GFP_KERNEL); in erofs_xattr_prefixes_init()
492 return -ENOMEM; in erofs_xattr_prefixes_init()
494 if (sbi->packed_inode) in erofs_xattr_prefixes_init()
495 buf.inode = sbi->packed_inode; in erofs_xattr_prefixes_init()
499 for (i = 0; i < sbi->xattr_prefix_count; i++) { in erofs_xattr_prefixes_init()
505 } else if (len < sizeof(*pfs->prefix) || in erofs_xattr_prefixes_init()
506 len > EROFS_NAME_LEN + sizeof(*pfs->prefix)) { in erofs_xattr_prefixes_init()
508 ret = -EFSCORRUPTED; in erofs_xattr_prefixes_init()
511 pfs[i].prefix = ptr; in erofs_xattr_prefixes_init()
512 pfs[i].infix_len = len - sizeof(struct erofs_xattr_long_prefix); in erofs_xattr_prefixes_init()
516 sbi->xattr_prefixes = pfs; in erofs_xattr_prefixes_init()
526 int prefix, rc; in erofs_get_acl() local
530 return ERR_PTR(-ECHILD); in erofs_get_acl()
534 prefix = EROFS_XATTR_INDEX_POSIX_ACL_ACCESS; in erofs_get_acl()
537 prefix = EROFS_XATTR_INDEX_POSIX_ACL_DEFAULT; in erofs_get_acl()
540 return ERR_PTR(-EINVAL); in erofs_get_acl()
543 rc = erofs_getxattr(inode, prefix, "", NULL, 0); in erofs_get_acl()
547 return ERR_PTR(-ENOMEM); in erofs_get_acl()
548 rc = erofs_getxattr(inode, prefix, "", value, rc); in erofs_get_acl()
551 if (rc == -ENOATTR) in erofs_get_acl()