From 4617721c502b2ddaa4e324e86da4997edf738fa5 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Wed, 2 Sep 2026 09:55:01 -0400 Subject: ftrace: Synchronize the initialization of ftrace_ops There's some internal state that ftrace_ops needs to have set, but since it can be declared outside of the ftrace.c code, it calls ftrace_ops_init() on the ops in every global function. The issue is that if two tasks call it on the same ops at the same time it is possible to have the initialization of one corrupt the initialization of the other call. Create a ops_mutex to use to synchronize every initialization of the ftrace_ops. The mutex is taken within checking the ftrace_ops flag that states it was initializied but the flag is checked again after the mutex has been taken. Checking first outside the mutex allows it to shortcut having to take the mutex. But then the check needs to be done again after the mute is taken in case of races. Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20260902095501.6b59af20@gandalf.local.home Fixes: f04f24fb7e48d ("ftrace, kprobes: Fix a deadlock on ftrace_regex_lock") Reported-by: sashiko-bot@kernel.org Close: https://lore.kernel.org/all/20260829025528.49A831F000E9@smtp.kernel.org/ Signed-off-by: Steven Rostedt --- fs/f2fs/xattr.c | 851 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 851 insertions(+) create mode 100644 fs/f2fs/xattr.c (limited to 'fs/f2fs/xattr.c') diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c new file mode 100644 index 000000000..6728d1488 --- /dev/null +++ b/fs/f2fs/xattr.c @@ -0,0 +1,851 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * fs/f2fs/xattr.c + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * Portions of this code from linux/fs/ext2/xattr.c + * + * Copyright (C) 2001-2003 Andreas Gruenbacher + * + * Fix by Harrison Xing . + * Extended attributes for symlinks and special files added per + * suggestion of Luka Renko . + * xattr consolidation Copyright (c) 2004 James Morris , + * Red Hat Inc. + */ +#include +#include +#include +#include +#include +#include "f2fs.h" +#include "xattr.h" +#include "segment.h" + +static struct kmem_cache *inline_xattr_slab; +static void *xattr_alloc(struct f2fs_sb_info *sbi, int size, bool *is_inline) +{ + if (likely(size == DEFAULT_XATTR_SLAB_SIZE)) { + *is_inline = true; + return f2fs_kmem_cache_alloc(inline_xattr_slab, + GFP_F2FS_ZERO, false, sbi); + } + *is_inline = false; + return f2fs_kzalloc(sbi, size, GFP_NOFS); +} + +static void xattr_free(struct f2fs_sb_info *sbi, void *xattr_addr, + bool is_inline) +{ + if (is_inline) + kmem_cache_free(inline_xattr_slab, xattr_addr); + else + kfree(xattr_addr); +} + +static int f2fs_xattr_generic_get(const struct xattr_handler *handler, + struct dentry *unused, struct inode *inode, + const char *name, void *buffer, size_t size) +{ + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + + switch (handler->flags) { + case F2FS_XATTR_INDEX_USER: + if (!test_opt(sbi, XATTR_USER)) + return -EOPNOTSUPP; + break; + case F2FS_XATTR_INDEX_TRUSTED: + case F2FS_XATTR_INDEX_SECURITY: + break; + default: + return -EINVAL; + } + return f2fs_getxattr(inode, handler->flags, name, + buffer, size, NULL); +} + +static int f2fs_xattr_generic_set(const struct xattr_handler *handler, + struct mnt_idmap *idmap, + struct dentry *unused, struct inode *inode, + const char *name, const void *value, + size_t size, int flags) +{ + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); + + switch (handler->flags) { + case F2FS_XATTR_INDEX_USER: + if (!test_opt(sbi, XATTR_USER)) + return -EOPNOTSUPP; + break; + case F2FS_XATTR_INDEX_TRUSTED: + case F2FS_XATTR_INDEX_SECURITY: + break; + default: + return -EINVAL; + } + return f2fs_setxattr(inode, handler->flags, name, + value, size, NULL, flags); +} + +static bool f2fs_xattr_user_list(struct dentry *dentry) +{ + struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb); + + return test_opt(sbi, XATTR_USER); +} + +static bool f2fs_xattr_trusted_list(struct dentry *dentry) +{ + return capable(CAP_SYS_ADMIN); +} + +static int f2fs_xattr_advise_get(const struct xattr_handler *handler, + struct dentry *unused, struct inode *inode, + const char *name, void *buffer, size_t size) +{ + if (buffer) + *((char *)buffer) = F2FS_I(inode)->i_advise; + return sizeof(char); +} + +static int f2fs_xattr_advise_set(const struct xattr_handler *handler, + struct mnt_idmap *idmap, + struct dentry *unused, struct inode *inode, + const char *name, const void *value, + size_t size, int flags) +{ + unsigned char old_advise = F2FS_I(inode)->i_advise; + unsigned char new_advise; + + if (!inode_owner_or_capable(idmap, inode)) + return -EPERM; + if (value == NULL) + return -EINVAL; + + new_advise = *(char *)value; + if (new_advise & ~FADVISE_MODIFIABLE_BITS) + return -EINVAL; + + new_advise = new_advise & FADVISE_MODIFIABLE_BITS; + new_advise |= old_advise & ~FADVISE_MODIFIABLE_BITS; + + F2FS_I(inode)->i_advise = new_advise; + f2fs_mark_inode_dirty_sync(inode, true); + return 0; +} + +#ifdef CONFIG_F2FS_FS_SECURITY +static int f2fs_initxattrs(struct inode *inode, const struct xattr *xattr_array, + void *folio) +{ + const struct xattr *xattr; + int err = 0; + + for (xattr = xattr_array; xattr->name != NULL; xattr++) { + err = f2fs_setxattr(inode, F2FS_XATTR_INDEX_SECURITY, + xattr->name, xattr->value, + xattr->value_len, folio, 0); + if (err < 0) + break; + } + return err; +} + +int f2fs_init_security(struct inode *inode, struct inode *dir, + const struct qstr *qstr, struct folio *ifolio) +{ + return security_inode_init_security(inode, dir, qstr, + f2fs_initxattrs, ifolio); +} +#endif + +const struct xattr_handler f2fs_xattr_user_handler = { + .prefix = XATTR_USER_PREFIX, + .flags = F2FS_XATTR_INDEX_USER, + .list = f2fs_xattr_user_list, + .get = f2fs_xattr_generic_get, + .set = f2fs_xattr_generic_set, +}; + +const struct xattr_handler f2fs_xattr_trusted_handler = { + .prefix = XATTR_TRUSTED_PREFIX, + .flags = F2FS_XATTR_INDEX_TRUSTED, + .list = f2fs_xattr_trusted_list, + .get = f2fs_xattr_generic_get, + .set = f2fs_xattr_generic_set, +}; + +const struct xattr_handler f2fs_xattr_advise_handler = { + .name = F2FS_SYSTEM_ADVISE_NAME, + .flags = F2FS_XATTR_INDEX_ADVISE, + .get = f2fs_xattr_advise_get, + .set = f2fs_xattr_advise_set, +}; + +const struct xattr_handler f2fs_xattr_security_handler = { + .prefix = XATTR_SECURITY_PREFIX, + .flags = F2FS_XATTR_INDEX_SECURITY, + .get = f2fs_xattr_generic_get, + .set = f2fs_xattr_generic_set, +}; + +static const struct xattr_handler * const f2fs_xattr_handler_map[] = { + [F2FS_XATTR_INDEX_USER] = &f2fs_xattr_user_handler, +#ifdef CONFIG_F2FS_FS_POSIX_ACL + [F2FS_XATTR_INDEX_POSIX_ACL_ACCESS] = &nop_posix_acl_access, + [F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &nop_posix_acl_default, +#endif + [F2FS_XATTR_INDEX_TRUSTED] = &f2fs_xattr_trusted_handler, +#ifdef CONFIG_F2FS_FS_SECURITY + [F2FS_XATTR_INDEX_SECURITY] = &f2fs_xattr_security_handler, +#endif + [F2FS_XATTR_INDEX_ADVISE] = &f2fs_xattr_advise_handler, +}; + +const struct xattr_handler * const f2fs_xattr_handlers[] = { + &f2fs_xattr_user_handler, + &f2fs_xattr_trusted_handler, +#ifdef CONFIG_F2FS_FS_SECURITY + &f2fs_xattr_security_handler, +#endif + &f2fs_xattr_advise_handler, + NULL, +}; + +static inline const char *f2fs_xattr_prefix(int index, + struct dentry *dentry) +{ + const struct xattr_handler *handler = NULL; + + if (index > 0 && index < ARRAY_SIZE(f2fs_xattr_handler_map)) + handler = f2fs_xattr_handler_map[index]; + + if (!xattr_handler_can_list(handler, dentry)) + return NULL; + + return xattr_prefix(handler); +} + +static struct f2fs_xattr_entry *__find_xattr(void *base_addr, + void *last_base_addr, void **last_addr, + int index, size_t len, const char *name) +{ + struct f2fs_xattr_entry *entry; + + list_for_each_xattr(entry, base_addr) { + if ((void *)(entry) + sizeof(__u32) > last_base_addr || + (void *)XATTR_NEXT_ENTRY(entry) > last_base_addr) { + if (last_addr) + *last_addr = entry; + return NULL; + } + + if (entry->e_name_index != index) + continue; + if (entry->e_name_len != len) + continue; + if (!memcmp(entry->e_name, name, len)) + break; + } + return entry; +} + +static struct f2fs_xattr_entry *__find_inline_xattr(struct inode *inode, + void *base_addr, void **last_addr, int index, + size_t len, const char *name) +{ + struct f2fs_xattr_entry *entry; + unsigned int inline_size = inline_xattr_size(inode); + void *max_addr = base_addr + inline_size; + + entry = __find_xattr(base_addr, max_addr, last_addr, index, len, name); + if (!entry) + return NULL; + + /* inline xattr header or entry across max inline xattr size */ + if (IS_XATTR_LAST_ENTRY(entry) && + (void *)entry + sizeof(__u32) > max_addr) { + *last_addr = entry; + return NULL; + } + return entry; +} + +static int read_inline_xattr(struct inode *inode, struct folio *ifolio, + void *txattr_addr) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + unsigned int inline_size = inline_xattr_size(inode); + struct folio *folio = NULL; + void *inline_addr; + + if (ifolio) { + inline_addr = inline_xattr_addr(inode, ifolio); + } else { + folio = f2fs_get_inode_folio(sbi, inode->i_ino); + if (IS_ERR(folio)) + return PTR_ERR(folio); + + inline_addr = inline_xattr_addr(inode, folio); + } + memcpy(txattr_addr, inline_addr, inline_size); + f2fs_folio_put(folio, true); + + return 0; +} + +static int read_xattr_block(struct inode *inode, void *txattr_addr) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + nid_t xnid = F2FS_I(inode)->i_xattr_nid; + unsigned int inline_size = inline_xattr_size(inode); + struct folio *xfolio; + void *xattr_addr; + + /* The inode already has an extended attribute block. */ + xfolio = f2fs_get_xnode_folio(sbi, xnid); + if (IS_ERR(xfolio)) + return PTR_ERR(xfolio); + + xattr_addr = folio_address(xfolio); + memcpy(txattr_addr + inline_size, xattr_addr, VALID_XATTR_BLOCK_SIZE); + f2fs_folio_put(xfolio, true); + + return 0; +} + +static int lookup_all_xattrs(struct inode *inode, struct folio *ifolio, + unsigned int index, unsigned int len, + const char *name, struct f2fs_xattr_entry **xe, + void **base_addr, int *base_size, + bool *is_inline) +{ + void *cur_addr, *txattr_addr, *last_txattr_addr; + void *last_addr = NULL; + nid_t xnid = F2FS_I(inode)->i_xattr_nid; + unsigned int inline_size = inline_xattr_size(inode); + int err; + + if (!xnid && !inline_size) + return -ENODATA; + + *base_size = XATTR_SIZE(inode) + XATTR_PADDING_SIZE; + txattr_addr = xattr_alloc(F2FS_I_SB(inode), *base_size, is_inline); + if (!txattr_addr) + return -ENOMEM; + + last_txattr_addr = (void *)txattr_addr + XATTR_SIZE(inode); + + /* read from inline xattr */ + if (inline_size) { + err = read_inline_xattr(inode, ifolio, txattr_addr); + if (err) + goto out; + + *xe = __find_inline_xattr(inode, txattr_addr, &last_addr, + index, len, name); + if (*xe) { + *base_size = inline_size; + goto check; + } + } + + /* read from xattr node block */ + if (xnid) { + err = read_xattr_block(inode, txattr_addr); + if (err) + goto out; + } + + if (last_addr) + cur_addr = XATTR_HDR(last_addr) - 1; + else + cur_addr = txattr_addr; + + *xe = __find_xattr(cur_addr, last_txattr_addr, NULL, index, len, name); + if (!*xe) { + f2fs_err(F2FS_I_SB(inode), "lookup inode (%llu) has corrupted xattr", + inode->i_ino); + set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK); + err = -ENODATA; + f2fs_handle_error(F2FS_I_SB(inode), + ERROR_CORRUPTED_XATTR); + fserror_report_file_metadata(inode, err, GFP_NOFS); + goto out; + } +check: + if (IS_XATTR_LAST_ENTRY(*xe)) { + err = -ENODATA; + goto out; + } + + *base_addr = txattr_addr; + return 0; +out: + xattr_free(F2FS_I_SB(inode), txattr_addr, *is_inline); + return err; +} + +static int read_all_xattrs(struct inode *inode, struct folio *ifolio, + void **base_addr) +{ + struct f2fs_xattr_header *header; + nid_t xnid = F2FS_I(inode)->i_xattr_nid; + unsigned int size = VALID_XATTR_BLOCK_SIZE; + unsigned int inline_size = inline_xattr_size(inode); + void *txattr_addr; + int err; + + txattr_addr = f2fs_kzalloc(F2FS_I_SB(inode), + inline_size + size + XATTR_PADDING_SIZE, GFP_NOFS); + if (!txattr_addr) + return -ENOMEM; + + /* read from inline xattr */ + if (inline_size) { + err = read_inline_xattr(inode, ifolio, txattr_addr); + if (err) + goto fail; + } + + /* read from xattr node block */ + if (xnid) { + err = read_xattr_block(inode, txattr_addr); + if (err) + goto fail; + } + + header = XATTR_HDR(txattr_addr); + + /* never been allocated xattrs */ + if (le32_to_cpu(header->h_magic) != F2FS_XATTR_MAGIC) { + header->h_magic = cpu_to_le32(F2FS_XATTR_MAGIC); + header->h_refcount = cpu_to_le32(1); + } + *base_addr = txattr_addr; + return 0; +fail: + kfree(txattr_addr); + return err; +} + +static inline int write_all_xattrs(struct inode *inode, __u32 hsize, + void *txattr_addr, struct folio *ifolio) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + size_t inline_size = inline_xattr_size(inode); + struct folio *in_folio = NULL; + void *xattr_addr; + void *inline_addr = NULL; + struct folio *xfolio; + nid_t new_nid = 0; + int err = 0; + + if (hsize > inline_size && !F2FS_I(inode)->i_xattr_nid) + if (!f2fs_alloc_nid(sbi, &new_nid)) + return -ENOSPC; + + /* write to inline xattr */ + if (inline_size) { + if (ifolio) { + inline_addr = inline_xattr_addr(inode, ifolio); + } else { + in_folio = f2fs_get_inode_folio(sbi, inode->i_ino); + if (IS_ERR(in_folio)) { + f2fs_alloc_nid_failed(sbi, new_nid); + return PTR_ERR(in_folio); + } + inline_addr = inline_xattr_addr(inode, in_folio); + } + + f2fs_folio_wait_writeback(ifolio ? ifolio : in_folio, + NODE, true, true); + /* no need to use xattr node block */ + if (hsize <= inline_size) { + err = f2fs_truncate_xattr_node(inode); + f2fs_alloc_nid_failed(sbi, new_nid); + if (err) { + f2fs_folio_put(in_folio, true); + return err; + } + memcpy(inline_addr, txattr_addr, inline_size); + folio_mark_dirty(ifolio ? ifolio : in_folio); + goto in_page_out; + } + } + + /* write to xattr node block */ + if (F2FS_I(inode)->i_xattr_nid) { + xfolio = f2fs_get_xnode_folio(sbi, F2FS_I(inode)->i_xattr_nid); + if (IS_ERR(xfolio)) { + err = PTR_ERR(xfolio); + f2fs_alloc_nid_failed(sbi, new_nid); + goto in_page_out; + } + f2fs_bug_on(sbi, new_nid); + f2fs_folio_wait_writeback(xfolio, NODE, true, true); + } else { + struct dnode_of_data dn; + + set_new_dnode(&dn, inode, NULL, NULL, new_nid); + xfolio = f2fs_new_node_folio(&dn, XATTR_NODE_OFFSET); + if (IS_ERR(xfolio)) { + err = PTR_ERR(xfolio); + f2fs_alloc_nid_failed(sbi, new_nid); + goto in_page_out; + } + f2fs_alloc_nid_done(sbi, new_nid); + } + xattr_addr = folio_address(xfolio); + + if (inline_size) + memcpy(inline_addr, txattr_addr, inline_size); + memcpy(xattr_addr, txattr_addr + inline_size, VALID_XATTR_BLOCK_SIZE); + + if (inline_size) + folio_mark_dirty(ifolio ? ifolio : in_folio); + folio_mark_dirty(xfolio); + + f2fs_folio_put(xfolio, true); +in_page_out: + f2fs_folio_put(in_folio, true); + return err; +} + +int f2fs_getxattr(struct inode *inode, int index, const char *name, + void *buffer, size_t buffer_size, struct folio *ifolio) +{ + struct f2fs_xattr_entry *entry = NULL; + int error; + unsigned int size, len; + void *base_addr = NULL; + int base_size; + bool is_inline; + + if (name == NULL) + return -EINVAL; + + len = strlen(name); + if (len > F2FS_NAME_LEN) + return -ERANGE; + + if (!ifolio) + f2fs_down_read(&F2FS_I(inode)->i_xattr_sem); + error = lookup_all_xattrs(inode, ifolio, index, len, name, + &entry, &base_addr, &base_size, &is_inline); + if (!ifolio) + f2fs_up_read(&F2FS_I(inode)->i_xattr_sem); + if (error) + return error; + + size = le16_to_cpu(entry->e_value_size); + + if (buffer && size > buffer_size) { + error = -ERANGE; + goto out; + } + + if (buffer) { + char *pval = entry->e_name + entry->e_name_len; + + if (base_size - (pval - (char *)base_addr) < size) { + error = -ERANGE; + goto out; + } + memcpy(buffer, pval, size); + } + error = size; +out: + xattr_free(F2FS_I_SB(inode), base_addr, is_inline); + return error; +} + +ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size) +{ + struct inode *inode = d_inode(dentry); + struct f2fs_xattr_entry *entry; + void *base_addr, *last_base_addr; + int error; + size_t rest = buffer_size; + + f2fs_down_read(&F2FS_I(inode)->i_xattr_sem); + error = read_all_xattrs(inode, NULL, &base_addr); + f2fs_up_read(&F2FS_I(inode)->i_xattr_sem); + if (error) + return error; + + last_base_addr = (void *)base_addr + XATTR_SIZE(inode); + + list_for_each_xattr(entry, base_addr) { + const char *prefix; + size_t prefix_len; + size_t size; + + if ((void *)(entry) + sizeof(__u32) > last_base_addr || + (void *)XATTR_NEXT_ENTRY(entry) > last_base_addr) { + f2fs_err(F2FS_I_SB(inode), "list inode (%llu) has corrupted xattr", + inode->i_ino); + set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK); + f2fs_handle_error(F2FS_I_SB(inode), + ERROR_CORRUPTED_XATTR); + fserror_report_file_metadata(inode, + -EFSCORRUPTED, GFP_NOFS); + error = -EFSCORRUPTED; + goto cleanup; + } + + prefix = f2fs_xattr_prefix(entry->e_name_index, dentry); + if (!prefix) + continue; + + prefix_len = strlen(prefix); + size = prefix_len + entry->e_name_len + 1; + if (buffer) { + if (size > rest) { + error = -ERANGE; + goto cleanup; + } + memcpy(buffer, prefix, prefix_len); + buffer += prefix_len; + memcpy(buffer, entry->e_name, entry->e_name_len); + buffer += entry->e_name_len; + *buffer++ = 0; + } + rest -= size; + } + error = buffer_size - rest; +cleanup: + kfree(base_addr); + return error; +} + +static bool f2fs_xattr_value_same(struct f2fs_xattr_entry *entry, + const void *value, size_t size) +{ + void *pval = entry->e_name + entry->e_name_len; + + return (le16_to_cpu(entry->e_value_size) == size) && + !memcmp(pval, value, size); +} + +static int __f2fs_setxattr(struct inode *inode, int index, + const char *name, const void *value, size_t size, + struct folio *ifolio, int flags) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + struct f2fs_xattr_entry *here, *last; + void *base_addr, *last_base_addr; + int found, newsize; + size_t len; + __u32 new_hsize; + int error; + + if (name == NULL) + return -EINVAL; + + if (value == NULL) + size = 0; + + len = strlen(name); + + if (len > F2FS_NAME_LEN) + return -ERANGE; + + if (size > MAX_VALUE_LEN(inode)) + return -E2BIG; +retry: + error = read_all_xattrs(inode, ifolio, &base_addr); + if (error) + return error; + + last_base_addr = (void *)base_addr + XATTR_SIZE(inode); + + /* find entry with wanted name. */ + here = __find_xattr(base_addr, last_base_addr, NULL, index, len, name); + if (!here) { + if (!F2FS_I(inode)->i_xattr_nid) { + error = f2fs_recover_xattr_data(inode, NULL); + f2fs_notice(F2FS_I_SB(inode), + "recover xattr in inode (%llu), error(%d)", + inode->i_ino, error); + if (!error) { + kfree(base_addr); + goto retry; + } + } + f2fs_err(F2FS_I_SB(inode), "set inode (%llu) has corrupted xattr", + inode->i_ino); + set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK); + error = -EFSCORRUPTED; + f2fs_handle_error(F2FS_I_SB(inode), + ERROR_CORRUPTED_XATTR); + fserror_report_file_metadata(inode, error, GFP_NOFS); + goto exit; + } + + found = IS_XATTR_LAST_ENTRY(here) ? 0 : 1; + + if (found) { + if ((flags & XATTR_CREATE)) { + error = -EEXIST; + goto exit; + } + + if (value && f2fs_xattr_value_same(here, value, size)) + goto same; + } else if ((flags & XATTR_REPLACE)) { + error = -ENODATA; + goto exit; + } + + last = here; + while (!IS_XATTR_LAST_ENTRY(last)) { + if ((void *)(last) + sizeof(__u32) > last_base_addr || + (void *)XATTR_NEXT_ENTRY(last) > last_base_addr) { + f2fs_err(F2FS_I_SB(inode), "inode (%llu) has invalid last xattr entry, entry_size: %zu", + inode->i_ino, ENTRY_SIZE(last)); + set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK); + error = -EFSCORRUPTED; + f2fs_handle_error(F2FS_I_SB(inode), + ERROR_CORRUPTED_XATTR); + fserror_report_file_metadata(inode, error, GFP_NOFS); + goto exit; + } + last = XATTR_NEXT_ENTRY(last); + } + + newsize = XATTR_ALIGN(sizeof(struct f2fs_xattr_entry) + len + size); + + /* 1. Check space */ + if (value) { + int free; + /* + * If value is NULL, it is remove operation. + * In case of update operation, we calculate free. + */ + free = MIN_OFFSET(inode) - ((char *)last - (char *)base_addr); + if (found) + free = free + ENTRY_SIZE(here); + + if (unlikely(free < newsize)) { + error = -E2BIG; + goto exit; + } + } + + /* 2. Remove old entry */ + if (found) { + /* + * If entry is found, remove old entry. + * If not found, remove operation is not needed. + */ + struct f2fs_xattr_entry *next = XATTR_NEXT_ENTRY(here); + int oldsize = ENTRY_SIZE(here); + + memmove(here, next, (char *)last - (char *)next); + last = (struct f2fs_xattr_entry *)((char *)last - oldsize); + memset(last, 0, oldsize); + } + + new_hsize = (char *)last - (char *)base_addr; + + /* 3. Write new entry */ + if (value) { + char *pval; + /* + * Before we come here, old entry is removed. + * We just write new entry. + */ + last->e_name_index = index; + last->e_name_len = len; + memcpy(last->e_name, name, len); + pval = last->e_name + len; + memcpy(pval, value, size); + last->e_value_size = cpu_to_le16(size); + new_hsize += newsize; + /* + * Explicitly add the null terminator. The unused xattr space + * is supposed to always be zeroed, which would make this + * unnecessary, but don't depend on that. + */ + *(u32 *)((u8 *)last + newsize) = 0; + } + + error = write_all_xattrs(inode, new_hsize, base_addr, ifolio); + if (error) + goto exit; + + if (index == F2FS_XATTR_INDEX_ENCRYPTION && + !strcmp(name, F2FS_XATTR_NAME_ENCRYPTION_CONTEXT)) + f2fs_set_encrypted_inode(inode); + + if (!S_ISDIR(inode->i_mode)) + goto same; + /* + * In restrict mode, fsync() always try to trigger checkpoint for all + * metadata consistency, in other mode, it triggers checkpoint when + * parent's xattr metadata was updated. + */ + if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) + set_sbi_flag(sbi, SBI_NEED_CP); + else + f2fs_add_ino_entry(sbi, inode->i_ino, XATTR_DIR_INO); +same: + if (is_inode_flag_set(inode, FI_ACL_MODE)) { + inode->i_mode = F2FS_I(inode)->i_acl_mode; + clear_inode_flag(inode, FI_ACL_MODE); + } + + inode_set_ctime_current(inode); + f2fs_mark_inode_dirty_sync(inode, true); +exit: + kfree(base_addr); + return error; +} + +int f2fs_setxattr(struct inode *inode, int index, const char *name, + const void *value, size_t size, + struct folio *ifolio, int flags) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + struct f2fs_lock_context lc; + int err; + + if (unlikely(f2fs_cp_error(sbi))) + return -EIO; + if (!f2fs_is_checkpoint_ready(sbi)) + return -ENOSPC; + + err = f2fs_dquot_initialize(inode); + if (err) + return err; + + /* this case is only from f2fs_init_inode_metadata */ + if (ifolio) + return __f2fs_setxattr(inode, index, name, value, + size, ifolio, flags); + f2fs_balance_fs(sbi, true); + + f2fs_lock_op(sbi, &lc); + f2fs_down_write(&F2FS_I(inode)->i_xattr_sem); + err = __f2fs_setxattr(inode, index, name, value, size, NULL, flags); + f2fs_up_write(&F2FS_I(inode)->i_xattr_sem); + f2fs_unlock_op(sbi, &lc); + + f2fs_update_time(sbi, REQ_TIME); + return err; +} + +int __init f2fs_init_xattr_cache(void) +{ + inline_xattr_slab = f2fs_kmem_cache_create("f2fs_xattr_entry", + DEFAULT_XATTR_SLAB_SIZE); + return inline_xattr_slab ? 0 : -ENOMEM; +} + +void f2fs_destroy_xattr_cache(void) +{ + kmem_cache_destroy(inline_xattr_slab); +} \ No newline at end of file -- cgit v1.3.1