diff options
Diffstat (limited to 'qemu/roms/u-boot/fs/ubifs/misc.h')
-rw-r--r-- | qemu/roms/u-boot/fs/ubifs/misc.h | 311 |
1 files changed, 0 insertions, 311 deletions
diff --git a/qemu/roms/u-boot/fs/ubifs/misc.h b/qemu/roms/u-boot/fs/ubifs/misc.h deleted file mode 100644 index 609232e93..000000000 --- a/qemu/roms/u-boot/fs/ubifs/misc.h +++ /dev/null @@ -1,311 +0,0 @@ -/* - * This file is part of UBIFS. - * - * Copyright (C) 2006-2008 Nokia Corporation - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 as published by - * the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., 51 - * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - * - * Authors: Artem Bityutskiy (Битюцкий Артём) - * Adrian Hunter - */ - -/* - * This file contains miscellaneous helper functions. - */ - -#ifndef __UBIFS_MISC_H__ -#define __UBIFS_MISC_H__ - -/** - * ubifs_zn_dirty - check if znode is dirty. - * @znode: znode to check - * - * This helper function returns %1 if @znode is dirty and %0 otherwise. - */ -static inline int ubifs_zn_dirty(const struct ubifs_znode *znode) -{ - return !!test_bit(DIRTY_ZNODE, &znode->flags); -} - -/** - * ubifs_wake_up_bgt - wake up background thread. - * @c: UBIFS file-system description object - */ -static inline void ubifs_wake_up_bgt(struct ubifs_info *c) -{ - if (c->bgt && !c->need_bgt) { - c->need_bgt = 1; - wake_up_process(c->bgt); - } -} - -/** - * ubifs_tnc_find_child - find next child in znode. - * @znode: znode to search at - * @start: the zbranch index to start at - * - * This helper function looks for znode child starting at index @start. Returns - * the child or %NULL if no children were found. - */ -static inline struct ubifs_znode * -ubifs_tnc_find_child(struct ubifs_znode *znode, int start) -{ - while (start < znode->child_cnt) { - if (znode->zbranch[start].znode) - return znode->zbranch[start].znode; - start += 1; - } - - return NULL; -} - -/** - * ubifs_inode - get UBIFS inode information by VFS 'struct inode' object. - * @inode: the VFS 'struct inode' pointer - */ -static inline struct ubifs_inode *ubifs_inode(const struct inode *inode) -{ - return container_of(inode, struct ubifs_inode, vfs_inode); -} - -/** - * ubifs_compr_present - check if compressor was compiled in. - * @compr_type: compressor type to check - * - * This function returns %1 of compressor of type @compr_type is present, and - * %0 if not. - */ -static inline int ubifs_compr_present(int compr_type) -{ - ubifs_assert(compr_type >= 0 && compr_type < UBIFS_COMPR_TYPES_CNT); - return !!ubifs_compressors[compr_type]->capi_name; -} - -/** - * ubifs_compr_name - get compressor name string by its type. - * @compr_type: compressor type - * - * This function returns compressor type string. - */ -static inline const char *ubifs_compr_name(int compr_type) -{ - ubifs_assert(compr_type >= 0 && compr_type < UBIFS_COMPR_TYPES_CNT); - return ubifs_compressors[compr_type]->name; -} - -/** - * ubifs_wbuf_sync - synchronize write-buffer. - * @wbuf: write-buffer to synchronize - * - * This is the same as as 'ubifs_wbuf_sync_nolock()' but it does not assume - * that the write-buffer is already locked. - */ -static inline int ubifs_wbuf_sync(struct ubifs_wbuf *wbuf) -{ - int err; - - mutex_lock_nested(&wbuf->io_mutex, wbuf->jhead); - err = ubifs_wbuf_sync_nolock(wbuf); - mutex_unlock(&wbuf->io_mutex); - return err; -} - -/** - * ubifs_leb_unmap - unmap an LEB. - * @c: UBIFS file-system description object - * @lnum: LEB number to unmap - * - * This function returns %0 on success and a negative error code on failure. - */ -static inline int ubifs_leb_unmap(const struct ubifs_info *c, int lnum) -{ - int err; - - if (c->ro_media) - return -EROFS; - err = ubi_leb_unmap(c->ubi, lnum); - if (err) { - ubifs_err("unmap LEB %d failed, error %d", lnum, err); - return err; - } - - return 0; -} - -/** - * ubifs_leb_write - write to a LEB. - * @c: UBIFS file-system description object - * @lnum: LEB number to write - * @buf: buffer to write from - * @offs: offset within LEB to write to - * @len: length to write - * @dtype: data type - * - * This function returns %0 on success and a negative error code on failure. - */ -static inline int ubifs_leb_write(const struct ubifs_info *c, int lnum, - const void *buf, int offs, int len, int dtype) -{ - int err; - - if (c->ro_media) - return -EROFS; - err = ubi_leb_write(c->ubi, lnum, buf, offs, len, dtype); - if (err) { - ubifs_err("writing %d bytes at %d:%d, error %d", - len, lnum, offs, err); - return err; - } - - return 0; -} - -/** - * ubifs_leb_change - atomic LEB change. - * @c: UBIFS file-system description object - * @lnum: LEB number to write - * @buf: buffer to write from - * @len: length to write - * @dtype: data type - * - * This function returns %0 on success and a negative error code on failure. - */ -static inline int ubifs_leb_change(const struct ubifs_info *c, int lnum, - const void *buf, int len, int dtype) -{ - int err; - - if (c->ro_media) - return -EROFS; - err = ubi_leb_change(c->ubi, lnum, buf, len, dtype); - if (err) { - ubifs_err("changing %d bytes in LEB %d, error %d", - len, lnum, err); - return err; - } - - return 0; -} - -/** - * ubifs_add_dirt - add dirty space to LEB properties. - * @c: the UBIFS file-system description object - * @lnum: LEB to add dirty space for - * @dirty: dirty space to add - * - * This is a helper function which increased amount of dirty LEB space. Returns - * zero in case of success and a negative error code in case of failure. - */ -static inline int ubifs_add_dirt(struct ubifs_info *c, int lnum, int dirty) -{ - return ubifs_update_one_lp(c, lnum, LPROPS_NC, dirty, 0, 0); -} - -/** - * ubifs_return_leb - return LEB to lprops. - * @c: the UBIFS file-system description object - * @lnum: LEB to return - * - * This helper function cleans the "taken" flag of a logical eraseblock in the - * lprops. Returns zero in case of success and a negative error code in case of - * failure. - */ -static inline int ubifs_return_leb(struct ubifs_info *c, int lnum) -{ - return ubifs_change_one_lp(c, lnum, LPROPS_NC, LPROPS_NC, 0, - LPROPS_TAKEN, 0); -} - -/** - * ubifs_idx_node_sz - return index node size. - * @c: the UBIFS file-system description object - * @child_cnt: number of children of this index node - */ -static inline int ubifs_idx_node_sz(const struct ubifs_info *c, int child_cnt) -{ - return UBIFS_IDX_NODE_SZ + (UBIFS_BRANCH_SZ + c->key_len) * child_cnt; -} - -/** - * ubifs_idx_branch - return pointer to an index branch. - * @c: the UBIFS file-system description object - * @idx: index node - * @bnum: branch number - */ -static inline -struct ubifs_branch *ubifs_idx_branch(const struct ubifs_info *c, - const struct ubifs_idx_node *idx, - int bnum) -{ - return (struct ubifs_branch *)((void *)idx->branches + - (UBIFS_BRANCH_SZ + c->key_len) * bnum); -} - -/** - * ubifs_idx_key - return pointer to an index key. - * @c: the UBIFS file-system description object - * @idx: index node - */ -static inline void *ubifs_idx_key(const struct ubifs_info *c, - const struct ubifs_idx_node *idx) -{ - const __u8 *branch = idx->branches; - return (void *)((struct ubifs_branch *)branch)->key; -} - -/** - * ubifs_tnc_lookup - look up a file-system node. - * @c: UBIFS file-system description object - * @key: node key to lookup - * @node: the node is returned here - * - * This function look up and reads node with key @key. The caller has to make - * sure the @node buffer is large enough to fit the node. Returns zero in case - * of success, %-ENOENT if the node was not found, and a negative error code in - * case of failure. - */ -static inline int ubifs_tnc_lookup(struct ubifs_info *c, - const union ubifs_key *key, void *node) -{ - return ubifs_tnc_locate(c, key, node, NULL, NULL); -} - -/** - * ubifs_get_lprops - get reference to LEB properties. - * @c: the UBIFS file-system description object - * - * This function locks lprops. Lprops have to be unlocked by - * 'ubifs_release_lprops()'. - */ -static inline void ubifs_get_lprops(struct ubifs_info *c) -{ - mutex_lock(&c->lp_mutex); -} - -/** - * ubifs_release_lprops - release lprops lock. - * @c: the UBIFS file-system description object - * - * This function has to be called after each 'ubifs_get_lprops()' call to - * unlock lprops. - */ -static inline void ubifs_release_lprops(struct ubifs_info *c) -{ - ubifs_assert(mutex_is_locked(&c->lp_mutex)); - ubifs_assert(c->lst.empty_lebs >= 0 && - c->lst.empty_lebs <= c->main_lebs); - mutex_unlock(&c->lp_mutex); -} - -#endif /* __UBIFS_MISC_H__ */ |