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Diffstat (limited to 'fs/exfat/namei.c')
-rw-r--r--fs/exfat/namei.c965
1 files changed, 425 insertions, 540 deletions
diff --git a/fs/exfat/namei.c b/fs/exfat/namei.c
index 5b0f35329d63..dfe957493d49 100644
--- a/fs/exfat/namei.c
+++ b/fs/exfat/namei.c
@@ -31,10 +31,9 @@ static inline void exfat_d_version_set(struct dentry *dentry,
* If it happened, the negative dentry isn't actually negative anymore. So,
* drop it.
*/
-static int exfat_d_revalidate(struct dentry *dentry, unsigned int flags)
+static int exfat_d_revalidate(struct inode *dir, const struct qstr *name,
+ struct dentry *dentry, unsigned int flags)
{
- int ret;
-
if (flags & LOOKUP_RCU)
return -ECHILD;
@@ -58,18 +57,17 @@ static int exfat_d_revalidate(struct dentry *dentry, unsigned int flags)
if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
return 0;
- spin_lock(&dentry->d_lock);
- ret = inode_eq_iversion(d_inode(dentry->d_parent),
- exfat_d_version(dentry));
- spin_unlock(&dentry->d_lock);
- return ret;
+ return inode_eq_iversion(dir, exfat_d_version(dentry));
}
-/* returns the length of a struct qstr, ignoring trailing dots */
-static unsigned int exfat_striptail_len(unsigned int len, const char *name)
+/* returns the length of a struct qstr, ignoring trailing dots if necessary */
+static unsigned int exfat_striptail_len(unsigned int len, const char *name,
+ bool keep_last_dots)
{
- while (len && name[len - 1] == '.')
- len--;
+ if (!keep_last_dots) {
+ while (len && name[len - 1] == '.')
+ len--;
+ }
return len;
}
@@ -83,7 +81,8 @@ static int exfat_d_hash(const struct dentry *dentry, struct qstr *qstr)
struct super_block *sb = dentry->d_sb;
struct nls_table *t = EXFAT_SB(sb)->nls_io;
const unsigned char *name = qstr->name;
- unsigned int len = exfat_striptail_len(qstr->len, qstr->name);
+ unsigned int len = exfat_striptail_len(qstr->len, qstr->name,
+ EXFAT_SB(sb)->options.keep_last_dots);
unsigned long hash = init_name_hash(dentry);
int i, charlen;
wchar_t c;
@@ -104,8 +103,10 @@ static int exfat_d_cmp(const struct dentry *dentry, unsigned int len,
{
struct super_block *sb = dentry->d_sb;
struct nls_table *t = EXFAT_SB(sb)->nls_io;
- unsigned int alen = exfat_striptail_len(name->len, name->name);
- unsigned int blen = exfat_striptail_len(len, str);
+ unsigned int alen = exfat_striptail_len(name->len, name->name,
+ EXFAT_SB(sb)->options.keep_last_dots);
+ unsigned int blen = exfat_striptail_len(len, str,
+ EXFAT_SB(sb)->options.keep_last_dots);
wchar_t c1, c2;
int charlen, i;
@@ -136,7 +137,8 @@ static int exfat_utf8_d_hash(const struct dentry *dentry, struct qstr *qstr)
{
struct super_block *sb = dentry->d_sb;
const unsigned char *name = qstr->name;
- unsigned int len = exfat_striptail_len(qstr->len, qstr->name);
+ unsigned int len = exfat_striptail_len(qstr->len, qstr->name,
+ EXFAT_SB(sb)->options.keep_last_dots);
unsigned long hash = init_name_hash(dentry);
int i, charlen;
unicode_t u;
@@ -161,8 +163,11 @@ static int exfat_utf8_d_cmp(const struct dentry *dentry, unsigned int len,
const char *str, const struct qstr *name)
{
struct super_block *sb = dentry->d_sb;
- unsigned int alen = exfat_striptail_len(name->len, name->name);
- unsigned int blen = exfat_striptail_len(len, str);
+ unsigned int alen = exfat_striptail_len(name->len, name->name,
+ EXFAT_SB(sb)->options.keep_last_dots);
+ unsigned int blen = exfat_striptail_len(len, str,
+ EXFAT_SB(sb)->options.keep_last_dots);
+
unicode_t u_a, u_b;
int charlen, i;
@@ -194,95 +199,75 @@ const struct dentry_operations exfat_utf8_dentry_ops = {
.d_compare = exfat_utf8_d_cmp,
};
-/* used only in search empty_slot() */
-#define CNT_UNUSED_NOHIT (-1)
-#define CNT_UNUSED_HIT (-2)
/* search EMPTY CONTINUOUS "num_entries" entries */
static int exfat_search_empty_slot(struct super_block *sb,
struct exfat_hint_femp *hint_femp, struct exfat_chain *p_dir,
- int num_entries)
+ int num_entries, struct exfat_entry_set_cache *es)
{
- int i, dentry, num_empty = 0;
+ int i, dentry, ret;
int dentries_per_clu;
- unsigned int type;
struct exfat_chain clu;
- struct exfat_dentry *ep;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
- struct buffer_head *bh;
+ int total_entries = EXFAT_CLU_TO_DEN(p_dir->size, sbi);
dentries_per_clu = sbi->dentries_per_clu;
if (hint_femp->eidx != EXFAT_HINT_NONE) {
dentry = hint_femp->eidx;
- if (num_entries <= hint_femp->count) {
- hint_femp->eidx = EXFAT_HINT_NONE;
- return dentry;
- }
+ /*
+ * If hint_femp->count is enough, it is needed to check if
+ * there are actual empty entries.
+ * Otherwise, and if "dentry + hint_famp->count" is also equal
+ * to "p_dir->size * dentries_per_clu", it means ENOSPC.
+ */
+ if (dentry + hint_femp->count == total_entries &&
+ num_entries > hint_femp->count)
+ return -ENOSPC;
+
+ hint_femp->eidx = EXFAT_HINT_NONE;
exfat_chain_dup(&clu, &hint_femp->cur);
} else {
exfat_chain_dup(&clu, p_dir);
dentry = 0;
}
- while (clu.dir != EXFAT_EOF_CLUSTER) {
+ while (dentry + num_entries <= total_entries &&
+ clu.dir != EXFAT_EOF_CLUSTER) {
i = dentry & (dentries_per_clu - 1);
- for (; i < dentries_per_clu; i++, dentry++) {
- ep = exfat_get_dentry(sb, &clu, i, &bh, NULL);
- if (!ep)
- return -EIO;
- type = exfat_get_entry_type(ep);
- brelse(bh);
+ ret = exfat_get_empty_dentry_set(es, sb, &clu, i, num_entries);
+ if (ret < 0)
+ return ret;
+ else if (ret == 0)
+ return dentry;
+
+ dentry += ret;
+ i += ret;
- if (type == TYPE_UNUSED || type == TYPE_DELETED) {
- num_empty++;
- if (hint_femp->eidx == EXFAT_HINT_NONE) {
- hint_femp->eidx = dentry;
- hint_femp->count = CNT_UNUSED_NOHIT;
- exfat_chain_set(&hint_femp->cur,
- clu.dir, clu.size, clu.flags);
- }
-
- if (type == TYPE_UNUSED &&
- hint_femp->count != CNT_UNUSED_HIT)
- hint_femp->count = CNT_UNUSED_HIT;
+ while (i >= dentries_per_clu) {
+ if (clu.flags == ALLOC_NO_FAT_CHAIN) {
+ if (--clu.size > 0)
+ clu.dir++;
+ else
+ clu.dir = EXFAT_EOF_CLUSTER;
} else {
- if (hint_femp->eidx != EXFAT_HINT_NONE &&
- hint_femp->count == CNT_UNUSED_HIT) {
- /* unused empty group means
- * an empty group which includes
- * unused dentry
- */
- exfat_fs_error(sb,
- "found bogus dentry(%d) beyond unused empty group(%d) (start_clu : %u, cur_clu : %u)",
- dentry, hint_femp->eidx,
- p_dir->dir, clu.dir);
+ if (exfat_get_next_cluster(sb, &clu.dir))
return -EIO;
- }
-
- num_empty = 0;
- hint_femp->eidx = EXFAT_HINT_NONE;
}
- if (num_empty >= num_entries) {
- /* found and invalidate hint_femp */
- hint_femp->eidx = EXFAT_HINT_NONE;
- return (dentry - (num_entries - 1));
- }
- }
-
- if (clu.flags == ALLOC_NO_FAT_CHAIN) {
- if (--clu.size > 0)
- clu.dir++;
- else
- clu.dir = EXFAT_EOF_CLUSTER;
- } else {
- if (exfat_get_next_cluster(sb, &clu.dir))
- return -EIO;
+ i -= dentries_per_clu;
}
}
+ hint_femp->eidx = dentry;
+ hint_femp->count = 0;
+ if (dentry == total_entries || clu.dir == EXFAT_EOF_CLUSTER)
+ exfat_chain_set(&hint_femp->cur, EXFAT_EOF_CLUSTER, 0,
+ clu.flags);
+ else
+ hint_femp->cur = clu;
+
return -ENOSPC;
}
@@ -290,7 +275,7 @@ static int exfat_check_max_dentries(struct inode *inode)
{
if (EXFAT_B_TO_DEN(i_size_read(inode)) >= MAX_EXFAT_DENTRIES) {
/*
- * exFAT spec allows a dir to grow upto 8388608(256MB)
+ * exFAT spec allows a dir to grow up to 8388608(256MB)
* dentries
*/
return -ENOSPC;
@@ -298,18 +283,31 @@ static int exfat_check_max_dentries(struct inode *inode)
return 0;
}
-/* find empty directory entry.
- * if there isn't any empty slot, expand cluster chain.
+/*
+ * Find an empty directory entry set.
+ *
+ * If there isn't any empty slot, expand cluster chain.
+ *
+ * in:
+ * inode: inode of the parent directory
+ * num_entries: specifies how many dentries in the empty directory entry set
+ *
+ * out:
+ * p_dir: the cluster where the empty directory entry set is located
+ * es: The found empty directory entry set
+ *
+ * return:
+ * the directory entry index in p_dir is returned on succeeds
+ * -error code is returned on failure
*/
-static int exfat_find_empty_entry(struct inode *inode,
- struct exfat_chain *p_dir, int num_entries)
+int exfat_find_empty_entry(struct inode *inode,
+ struct exfat_chain *p_dir, int num_entries,
+ struct exfat_entry_set_cache *es)
{
int dentry;
unsigned int ret, last_clu;
- sector_t sector;
loff_t size = 0;
struct exfat_chain clu;
- struct exfat_dentry *ep = NULL;
struct super_block *sb = inode->i_sb;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
struct exfat_inode_info *ei = EXFAT_I(inode);
@@ -318,36 +316,50 @@ static int exfat_find_empty_entry(struct inode *inode,
hint_femp.eidx = EXFAT_HINT_NONE;
if (ei->hint_femp.eidx != EXFAT_HINT_NONE) {
- memcpy(&hint_femp, &ei->hint_femp,
- sizeof(struct exfat_hint_femp));
+ hint_femp = ei->hint_femp;
ei->hint_femp.eidx = EXFAT_HINT_NONE;
}
+ exfat_chain_set(p_dir, ei->start_clu,
+ EXFAT_B_TO_CLU(i_size_read(inode), sbi), ei->flags);
+
while ((dentry = exfat_search_empty_slot(sb, &hint_femp, p_dir,
- num_entries)) < 0) {
- if (dentry == -EIO)
- break;
+ num_entries, es)) < 0) {
+ if (dentry != -ENOSPC)
+ return dentry;
if (exfat_check_max_dentries(inode))
return -ENOSPC;
- /* we trust p_dir->size regardless of FAT type */
- if (exfat_find_last_cluster(sb, p_dir, &last_clu))
- return -EIO;
-
/*
* Allocate new cluster to this directory
*/
- exfat_chain_set(&clu, last_clu + 1, 0, p_dir->flags);
+ if (ei->start_clu != EXFAT_EOF_CLUSTER) {
+ /* we trust p_dir->size regardless of FAT type */
+ if (exfat_find_last_cluster(sb, p_dir, &last_clu))
+ return -EIO;
+
+ exfat_chain_set(&clu, last_clu + 1, 0, p_dir->flags);
+ } else {
+ /* This directory is empty */
+ exfat_chain_set(&clu, EXFAT_EOF_CLUSTER, 0,
+ ALLOC_NO_FAT_CHAIN);
+ }
/* allocate a cluster */
- ret = exfat_alloc_cluster(inode, 1, &clu);
+ ret = exfat_alloc_cluster(inode, 1, &clu, IS_DIRSYNC(inode));
if (ret)
return ret;
if (exfat_zeroed_cluster(inode, clu.dir))
return -EIO;
+ if (ei->start_clu == EXFAT_EOF_CLUSTER) {
+ ei->start_clu = clu.dir;
+ p_dir->dir = clu.dir;
+ hint_femp.eidx = 0;
+ }
+
/* append to the FAT chain */
if (clu.flags != p_dir->flags) {
/* no-fat-chain bit is disabled,
@@ -362,47 +374,26 @@ static int exfat_find_empty_entry(struct inode *inode,
if (exfat_ent_set(sb, last_clu, clu.dir))
return -EIO;
- if (hint_femp.eidx == EXFAT_HINT_NONE) {
- /* the special case that new dentry
- * should be allocated from the start of new cluster
- */
- hint_femp.eidx = EXFAT_B_TO_DEN_IDX(p_dir->size, sbi);
- hint_femp.count = sbi->dentries_per_clu;
-
+ if (hint_femp.cur.dir == EXFAT_EOF_CLUSTER)
exfat_chain_set(&hint_femp.cur, clu.dir, 0, clu.flags);
- }
+
+ hint_femp.count += sbi->dentries_per_clu;
+
hint_femp.cur.size++;
p_dir->size++;
size = EXFAT_CLU_TO_B(p_dir->size, sbi);
- /* update the directory entry */
- if (p_dir->dir != sbi->root_dir) {
- struct buffer_head *bh;
-
- ep = exfat_get_dentry(sb,
- &(ei->dir), ei->entry + 1, &bh, &sector);
- if (!ep)
- return -EIO;
-
- ep->dentry.stream.valid_size = cpu_to_le64(size);
- ep->dentry.stream.size = ep->dentry.stream.valid_size;
- ep->dentry.stream.flags = p_dir->flags;
- exfat_update_bh(sb, bh, IS_DIRSYNC(inode));
- brelse(bh);
- if (exfat_update_dir_chksum(inode, &(ei->dir),
- ei->entry))
- return -EIO;
- }
-
/* directory inode should be updated in here */
i_size_write(inode, size);
- EXFAT_I(inode)->i_size_ondisk += sbi->cluster_size;
- EXFAT_I(inode)->i_size_aligned += sbi->cluster_size;
- EXFAT_I(inode)->flags = p_dir->flags;
- inode->i_blocks += 1 << sbi->sect_per_clus_bits;
+ ei->valid_size += sbi->cluster_size;
+ ei->flags = p_dir->flags;
+ inode->i_blocks += sbi->cluster_size >> 9;
}
- return dentry;
+ p_dir->dir = exfat_sector_to_cluster(sbi, es->bh[0]->b_blocknr);
+ p_dir->size -= dentry / sbi->dentries_per_clu;
+
+ return dentry & (sbi->dentries_per_clu - 1);
}
/*
@@ -410,21 +401,30 @@ static int exfat_find_empty_entry(struct inode *inode,
* Zero if it was successful; otherwise nonzero.
*/
static int __exfat_resolve_path(struct inode *inode, const unsigned char *path,
- struct exfat_chain *p_dir, struct exfat_uni_name *p_uniname,
- int lookup)
+ struct exfat_uni_name *p_uniname, int lookup)
{
int namelen;
int lossy = NLS_NAME_NO_LOSSY;
struct super_block *sb = inode->i_sb;
- struct exfat_sb_info *sbi = EXFAT_SB(sb);
- struct exfat_inode_info *ei = EXFAT_I(inode);
+ int pathlen = strlen(path);
- /* strip all trailing periods */
- namelen = exfat_striptail_len(strlen(path), path);
+ /*
+ * get the length of the pathname excluding
+ * trailing periods, if any.
+ */
+ namelen = exfat_striptail_len(pathlen, path, false);
+ if (EXFAT_SB(sb)->options.keep_last_dots) {
+ /*
+ * Do not allow the creation of files with names
+ * ending with period(s).
+ */
+ if (!lookup && (namelen < pathlen))
+ return -EINVAL;
+ namelen = pathlen;
+ }
if (!namelen)
return -ENOENT;
-
- if (strlen(path) > (MAX_NAME_LENGTH * MAX_CHARSET_SIZE))
+ if (pathlen > (MAX_NAME_LENGTH * MAX_CHARSET_SIZE))
return -ENAMETOOLONG;
/*
@@ -444,24 +444,19 @@ static int __exfat_resolve_path(struct inode *inode, const unsigned char *path,
if ((lossy && !lookup) || !namelen)
return -EINVAL;
- exfat_chain_set(p_dir, ei->start_clu,
- EXFAT_B_TO_CLU(i_size_read(inode), sbi), ei->flags);
-
return 0;
}
static inline int exfat_resolve_path(struct inode *inode,
- const unsigned char *path, struct exfat_chain *dir,
- struct exfat_uni_name *uni)
+ const unsigned char *path, struct exfat_uni_name *uni)
{
- return __exfat_resolve_path(inode, path, dir, uni, 0);
+ return __exfat_resolve_path(inode, path, uni, 0);
}
static inline int exfat_resolve_path_for_lookup(struct inode *inode,
- const unsigned char *path, struct exfat_chain *dir,
- struct exfat_uni_name *uni)
+ const unsigned char *path, struct exfat_uni_name *uni)
{
- return __exfat_resolve_path(inode, path, dir, uni, 1);
+ return __exfat_resolve_path(inode, path, uni, 1);
}
static inline loff_t exfat_make_i_pos(struct exfat_dir_entry *info)
@@ -470,18 +465,19 @@ static inline loff_t exfat_make_i_pos(struct exfat_dir_entry *info)
}
static int exfat_add_entry(struct inode *inode, const char *path,
- struct exfat_chain *p_dir, unsigned int type,
- struct exfat_dir_entry *info)
+ unsigned int type, struct exfat_dir_entry *info)
{
int ret, dentry, num_entries;
struct super_block *sb = inode->i_sb;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
struct exfat_uni_name uniname;
struct exfat_chain clu;
+ struct timespec64 ts = current_time(inode);
+ struct exfat_entry_set_cache es;
int clu_size = 0;
unsigned int start_clu = EXFAT_FREE_CLUSTER;
- ret = exfat_resolve_path(inode, path, p_dir, &uniname);
+ ret = exfat_resolve_path(inode, path, &uniname);
if (ret)
goto out;
@@ -492,16 +488,18 @@ static int exfat_add_entry(struct inode *inode, const char *path,
}
/* exfat_find_empty_entry must be called before alloc_cluster() */
- dentry = exfat_find_empty_entry(inode, p_dir, num_entries);
+ dentry = exfat_find_empty_entry(inode, &info->dir, num_entries, &es);
if (dentry < 0) {
ret = dentry; /* -EIO or -ENOSPC */
goto out;
}
- if (type == TYPE_DIR) {
+ if (type == TYPE_DIR && !sbi->options.zero_size_dir) {
ret = exfat_alloc_new_dir(inode, &clu);
- if (ret)
+ if (ret) {
+ exfat_put_dentry_set(&es, false);
goto out;
+ }
start_clu = clu.dir;
clu_size = sbi->cluster_size;
}
@@ -510,40 +508,33 @@ static int exfat_add_entry(struct inode *inode, const char *path,
/* fill the dos name directory entry information of the created file.
* the first cluster is not determined yet. (0)
*/
- ret = exfat_init_dir_entry(inode, p_dir, dentry, type,
- start_clu, clu_size);
- if (ret)
- goto out;
+ exfat_init_dir_entry(&es, type, start_clu, clu_size, &ts);
+ exfat_init_ext_entry(&es, num_entries, &uniname);
- ret = exfat_init_ext_entry(inode, p_dir, dentry, num_entries, &uniname);
+ ret = exfat_put_dentry_set(&es, IS_DIRSYNC(inode));
if (ret)
goto out;
- memcpy(&info->dir, p_dir, sizeof(struct exfat_chain));
info->entry = dentry;
info->flags = ALLOC_NO_FAT_CHAIN;
info->type = type;
if (type == TYPE_FILE) {
- info->attr = ATTR_ARCHIVE;
+ info->attr = EXFAT_ATTR_ARCHIVE;
info->start_clu = EXFAT_EOF_CLUSTER;
info->size = 0;
info->num_subdirs = 0;
} else {
- int count;
- struct exfat_chain cdir;
-
- info->attr = ATTR_SUBDIR;
- info->start_clu = start_clu;
+ info->attr = EXFAT_ATTR_SUBDIR;
+ if (sbi->options.zero_size_dir)
+ info->start_clu = EXFAT_EOF_CLUSTER;
+ else
+ info->start_clu = start_clu;
info->size = clu_size;
-
- exfat_chain_set(&cdir, info->start_clu,
- EXFAT_B_TO_CLU(info->size, sbi), info->flags);
- count = exfat_count_dir_entries(sb, &cdir);
- if (count < 0)
- return -EIO;
- info->num_subdirs = count + EXFAT_MIN_SUBDIR;
+ info->num_subdirs = EXFAT_MIN_SUBDIR;
}
+ info->valid_size = info->size;
+
memset(&info->crtime, 0, sizeof(info->crtime));
memset(&info->mtime, 0, sizeof(info->mtime));
memset(&info->atime, 0, sizeof(info->atime));
@@ -551,40 +542,42 @@ out:
return ret;
}
-static int exfat_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- bool excl)
+static int exfat_create(struct mnt_idmap *idmap, struct inode *dir,
+ struct dentry *dentry, umode_t mode, bool excl)
{
struct super_block *sb = dir->i_sb;
struct inode *inode;
- struct exfat_chain cdir;
struct exfat_dir_entry info;
loff_t i_pos;
int err;
+ loff_t size = i_size_read(dir);
+
+ if (unlikely(exfat_forced_shutdown(sb)))
+ return -EIO;
mutex_lock(&EXFAT_SB(sb)->s_lock);
- exfat_set_vol_flags(sb, VOL_DIRTY);
- err = exfat_add_entry(dir, dentry->d_name.name, &cdir, TYPE_FILE,
- &info);
- exfat_set_vol_flags(sb, VOL_CLEAN);
+ exfat_set_volume_dirty(sb);
+ err = exfat_add_entry(dir, dentry->d_name.name, TYPE_FILE, &info);
if (err)
goto unlock;
inode_inc_iversion(dir);
- dir->i_ctime = dir->i_mtime = current_time(dir);
- if (IS_DIRSYNC(dir))
+ inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir));
+ if (IS_DIRSYNC(dir) && size != i_size_read(dir))
exfat_sync_inode(dir);
else
mark_inode_dirty(dir);
i_pos = exfat_make_i_pos(&info);
inode = exfat_build_inode(sb, &info, i_pos);
- if (IS_ERR(inode))
+ err = PTR_ERR_OR_ZERO(inode);
+ if (err)
goto unlock;
inode_inc_iversion(inode);
- inode->i_mtime = inode->i_atime = inode->i_ctime =
- EXFAT_I(inode)->i_crtime = current_time(inode);
- exfat_truncate_atime(&inode->i_atime);
+ EXFAT_I(inode)->i_crtime = simple_inode_init_ts(inode);
+ exfat_truncate_inode_atime(inode);
+
/* timestamp is already written, so mark_inode_dirty() is unneeded. */
d_instantiate(dentry, inode);
@@ -594,27 +587,30 @@ unlock:
}
/* lookup a file */
-static int exfat_find(struct inode *dir, struct qstr *qname,
+static int exfat_find(struct inode *dir, const struct qstr *qname,
struct exfat_dir_entry *info)
{
- int ret, dentry, num_entries, count;
+ int ret, dentry, count;
struct exfat_chain cdir;
struct exfat_uni_name uni_name;
struct super_block *sb = dir->i_sb;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
struct exfat_inode_info *ei = EXFAT_I(dir);
+ struct exfat_dentry *ep, *ep2;
+ struct exfat_entry_set_cache es;
+ /* for optimized dir & entry to prevent long traverse of cluster chain */
+ struct exfat_hint hint_opt;
if (qname->len == 0)
return -ENOENT;
/* check the validity of directory name in the given pathname */
- ret = exfat_resolve_path_for_lookup(dir, qname->name, &cdir, &uni_name);
+ ret = exfat_resolve_path_for_lookup(dir, qname->name, &uni_name);
if (ret)
return ret;
- num_entries = exfat_calc_num_entries(&uni_name);
- if (num_entries < 0)
- return num_entries;
+ exfat_chain_set(&cdir, ei->start_clu,
+ EXFAT_B_TO_CLU(i_size_read(dir), sbi), ei->flags);
/* check the validation of hint_stat and initialize it if required */
if (ei->version != (inode_peek_iversion_raw(dir) & 0xffffffff)) {
@@ -625,94 +621,92 @@ static int exfat_find(struct inode *dir, struct qstr *qname,
}
/* search the file name for directories */
- dentry = exfat_find_dir_entry(sb, ei, &cdir, &uni_name,
- num_entries, TYPE_ALL);
-
- if ((dentry < 0) && (dentry != -EEXIST))
+ dentry = exfat_find_dir_entry(sb, ei, &cdir, &uni_name, &hint_opt);
+ if (dentry < 0)
return dentry; /* -error value */
- memcpy(&info->dir, &cdir.dir, sizeof(struct exfat_chain));
+ /* adjust cdir to the optimized value */
+ cdir.dir = hint_opt.clu;
+ if (cdir.flags & ALLOC_NO_FAT_CHAIN)
+ cdir.size -= dentry / sbi->dentries_per_clu;
+ dentry = hint_opt.eidx;
+
+ info->dir = cdir;
info->entry = dentry;
info->num_subdirs = 0;
- /* root directory itself */
- if (unlikely(dentry == -EEXIST)) {
- int num_clu = 0;
-
- info->type = TYPE_DIR;
- info->attr = ATTR_SUBDIR;
- info->flags = ALLOC_FAT_CHAIN;
- info->start_clu = sbi->root_dir;
- memset(&info->crtime, 0, sizeof(info->crtime));
- memset(&info->mtime, 0, sizeof(info->mtime));
- memset(&info->atime, 0, sizeof(info->atime));
-
- exfat_chain_set(&cdir, sbi->root_dir, 0, ALLOC_FAT_CHAIN);
- if (exfat_count_num_clusters(sb, &cdir, &num_clu))
- return -EIO;
- info->size = num_clu << sbi->cluster_size_bits;
+ if (exfat_get_dentry_set(&es, sb, &cdir, dentry, ES_2_ENTRIES))
+ return -EIO;
+ ep = exfat_get_dentry_cached(&es, ES_IDX_FILE);
+ ep2 = exfat_get_dentry_cached(&es, ES_IDX_STREAM);
+
+ info->type = exfat_get_entry_type(ep);
+ info->attr = le16_to_cpu(ep->dentry.file.attr);
+ info->valid_size = le64_to_cpu(ep2->dentry.stream.valid_size);
+ info->size = le64_to_cpu(ep2->dentry.stream.size);
+
+ info->start_clu = le32_to_cpu(ep2->dentry.stream.start_clu);
+ if (!is_valid_cluster(sbi, info->start_clu) && info->size) {
+ exfat_warn(sb, "start_clu is invalid cluster(0x%x)",
+ info->start_clu);
+ info->size = 0;
+ info->valid_size = 0;
+ }
- count = exfat_count_dir_entries(sb, &cdir);
- if (count < 0)
- return -EIO;
+ if (info->valid_size > info->size) {
+ exfat_warn(sb, "valid_size(%lld) is greater than size(%lld)",
+ info->valid_size, info->size);
+ info->valid_size = info->size;
+ }
- info->num_subdirs = count;
- } else {
- struct exfat_dentry *ep, *ep2;
- struct exfat_entry_set_cache *es;
+ if (info->size == 0) {
+ info->flags = ALLOC_NO_FAT_CHAIN;
+ info->start_clu = EXFAT_EOF_CLUSTER;
+ } else
+ info->flags = ep2->dentry.stream.flags;
+
+ exfat_get_entry_time(sbi, &info->crtime,
+ ep->dentry.file.create_tz,
+ ep->dentry.file.create_time,
+ ep->dentry.file.create_date,
+ ep->dentry.file.create_time_cs);
+ exfat_get_entry_time(sbi, &info->mtime,
+ ep->dentry.file.modify_tz,
+ ep->dentry.file.modify_time,
+ ep->dentry.file.modify_date,
+ ep->dentry.file.modify_time_cs);
+ exfat_get_entry_time(sbi, &info->atime,
+ ep->dentry.file.access_tz,
+ ep->dentry.file.access_time,
+ ep->dentry.file.access_date,
+ 0);
+ exfat_put_dentry_set(&es, false);
+
+ if (info->valid_size < 0) {
+ exfat_fs_error(sb, "data valid size is invalid(%lld)", info->valid_size);
+ return -EIO;
+ }
- es = exfat_get_dentry_set(sb, &cdir, dentry, ES_2_ENTRIES);
- if (!es)
- return -EIO;
- ep = exfat_get_dentry_cached(es, 0);
- ep2 = exfat_get_dentry_cached(es, 1);
-
- info->type = exfat_get_entry_type(ep);
- info->attr = le16_to_cpu(ep->dentry.file.attr);
- info->size = le64_to_cpu(ep2->dentry.stream.valid_size);
- if ((info->type == TYPE_FILE) && (info->size == 0)) {
- info->flags = ALLOC_NO_FAT_CHAIN;
- info->start_clu = EXFAT_EOF_CLUSTER;
- } else {
- info->flags = ep2->dentry.stream.flags;
- info->start_clu =
- le32_to_cpu(ep2->dentry.stream.start_clu);
- }
+ if (unlikely(EXFAT_B_TO_CLU_ROUND_UP(info->size, sbi) > sbi->used_clusters)) {
+ exfat_fs_error(sb, "data size is invalid(%lld)", info->size);
+ return -EIO;
+ }
- if (ei->start_clu == EXFAT_FREE_CLUSTER) {
- exfat_fs_error(sb,
- "non-zero size file starts with zero cluster (size : %llu, p_dir : %u, entry : 0x%08x)",
- i_size_read(dir), ei->dir.dir, ei->entry);
- exfat_free_dentry_set(es, false);
- return -EIO;
- }
+ if (ei->start_clu == EXFAT_FREE_CLUSTER) {
+ exfat_fs_error(sb,
+ "non-zero size file starts with zero cluster (size : %llu, p_dir : %u, entry : 0x%08x)",
+ i_size_read(dir), ei->dir.dir, ei->entry);
+ return -EIO;
+ }
- exfat_get_entry_time(sbi, &info->crtime,
- ep->dentry.file.create_tz,
- ep->dentry.file.create_time,
- ep->dentry.file.create_date,
- ep->dentry.file.create_time_cs);
- exfat_get_entry_time(sbi, &info->mtime,
- ep->dentry.file.modify_tz,
- ep->dentry.file.modify_time,
- ep->dentry.file.modify_date,
- ep->dentry.file.modify_time_cs);
- exfat_get_entry_time(sbi, &info->atime,
- ep->dentry.file.access_tz,
- ep->dentry.file.access_time,
- ep->dentry.file.access_date,
- 0);
- exfat_free_dentry_set(es, false);
-
- if (info->type == TYPE_DIR) {
- exfat_chain_set(&cdir, info->start_clu,
+ if (info->type == TYPE_DIR) {
+ exfat_chain_set(&cdir, info->start_clu,
EXFAT_B_TO_CLU(info->size, sbi), info->flags);
- count = exfat_count_dir_entries(sb, &cdir);
- if (count < 0)
- return -EIO;
+ count = exfat_count_dir_entries(sb, &cdir);
+ if (count < 0)
+ return -EIO;
- info->num_subdirs = count + EXFAT_MIN_SUBDIR;
- }
+ info->num_subdirs = count + EXFAT_MIN_SUBDIR;
}
return 0;
}
@@ -745,10 +739,9 @@ static struct dentry *exfat_lookup(struct inode *dir, struct dentry *dentry,
i_pos = exfat_make_i_pos(&info);
inode = exfat_build_inode(sb, &info, i_pos);
- if (IS_ERR(inode)) {
- err = PTR_ERR(inode);
+ err = PTR_ERR_OR_ZERO(inode);
+ if (err)
goto unlock;
- }
i_mode = inode->i_mode;
alias = d_find_alias(inode);
@@ -802,60 +795,48 @@ unlock:
/* remove an entry, BUT don't truncate */
static int exfat_unlink(struct inode *dir, struct dentry *dentry)
{
- struct exfat_chain cdir;
- struct exfat_dentry *ep;
struct super_block *sb = dir->i_sb;
struct inode *inode = dentry->d_inode;
struct exfat_inode_info *ei = EXFAT_I(inode);
- struct buffer_head *bh;
- sector_t sector;
- int num_entries, entry, err = 0;
+ struct exfat_entry_set_cache es;
+ int err = 0;
+
+ if (unlikely(exfat_forced_shutdown(sb)))
+ return -EIO;
mutex_lock(&EXFAT_SB(sb)->s_lock);
- exfat_chain_dup(&cdir, &ei->dir);
- entry = ei->entry;
if (ei->dir.dir == DIR_DELETED) {
exfat_err(sb, "abnormal access to deleted dentry");
err = -ENOENT;
goto unlock;
}
- ep = exfat_get_dentry(sb, &cdir, entry, &bh, &sector);
- if (!ep) {
- err = -EIO;
- goto unlock;
- }
- num_entries = exfat_count_ext_entries(sb, &cdir, entry, ep);
- if (num_entries < 0) {
+ err = exfat_get_dentry_set_by_ei(&es, sb, ei);
+ if (err) {
err = -EIO;
- brelse(bh);
goto unlock;
}
- num_entries++;
- brelse(bh);
- exfat_set_vol_flags(sb, VOL_DIRTY);
+ exfat_set_volume_dirty(sb);
+
/* update the directory entry */
- if (exfat_remove_entries(dir, &cdir, entry, 0, num_entries)) {
- err = -EIO;
+ exfat_remove_entries(inode, &es, ES_IDX_FILE);
+
+ err = exfat_put_dentry_set(&es, IS_DIRSYNC(inode));
+ if (err)
goto unlock;
- }
/* This doesn't modify ei */
ei->dir.dir = DIR_DELETED;
- exfat_set_vol_flags(sb, VOL_CLEAN);
inode_inc_iversion(dir);
- dir->i_mtime = dir->i_atime = current_time(dir);
- exfat_truncate_atime(&dir->i_atime);
- if (IS_DIRSYNC(dir))
- exfat_sync_inode(dir);
- else
- mark_inode_dirty(dir);
+ simple_inode_init_ts(dir);
+ exfat_truncate_inode_atime(dir);
+ mark_inode_dirty(dir);
clear_nlink(inode);
- inode->i_mtime = inode->i_atime = current_time(inode);
- exfat_truncate_atime(&inode->i_atime);
+ simple_inode_init_ts(inode);
+ exfat_truncate_inode_atime(inode);
exfat_unhash_inode(inode);
exfat_d_version_set(dentry, inode_query_iversion(dir));
unlock:
@@ -863,26 +844,28 @@ unlock:
return err;
}
-static int exfat_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
+static struct dentry *exfat_mkdir(struct mnt_idmap *idmap, struct inode *dir,
+ struct dentry *dentry, umode_t mode)
{
struct super_block *sb = dir->i_sb;
struct inode *inode;
struct exfat_dir_entry info;
- struct exfat_chain cdir;
loff_t i_pos;
int err;
+ loff_t size = i_size_read(dir);
+
+ if (unlikely(exfat_forced_shutdown(sb)))
+ return ERR_PTR(-EIO);
mutex_lock(&EXFAT_SB(sb)->s_lock);
- exfat_set_vol_flags(sb, VOL_DIRTY);
- err = exfat_add_entry(dir, dentry->d_name.name, &cdir, TYPE_DIR,
- &info);
- exfat_set_vol_flags(sb, VOL_CLEAN);
+ exfat_set_volume_dirty(sb);
+ err = exfat_add_entry(dir, dentry->d_name.name, TYPE_DIR, &info);
if (err)
goto unlock;
inode_inc_iversion(dir);
- dir->i_ctime = dir->i_mtime = current_time(dir);
- if (IS_DIRSYNC(dir))
+ inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir));
+ if (IS_DIRSYNC(dir) && size != i_size_read(dir))
exfat_sync_inode(dir);
else
mark_inode_dirty(dir);
@@ -890,22 +873,20 @@ static int exfat_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
i_pos = exfat_make_i_pos(&info);
inode = exfat_build_inode(sb, &info, i_pos);
- if (IS_ERR(inode)) {
- err = PTR_ERR(inode);
+ err = PTR_ERR_OR_ZERO(inode);
+ if (err)
goto unlock;
- }
inode_inc_iversion(inode);
- inode->i_mtime = inode->i_atime = inode->i_ctime =
- EXFAT_I(inode)->i_crtime = current_time(inode);
- exfat_truncate_atime(&inode->i_atime);
+ EXFAT_I(inode)->i_crtime = simple_inode_init_ts(inode);
+ exfat_truncate_inode_atime(inode);
/* timestamp is already written, so mark_inode_dirty() is unneeded. */
d_instantiate(dentry, inode);
unlock:
mutex_unlock(&EXFAT_SB(sb)->s_lock);
- return err;
+ return ERR_PTR(err);
}
static int exfat_check_dir_empty(struct super_block *sb,
@@ -913,6 +894,7 @@ static int exfat_check_dir_empty(struct super_block *sb,
{
int i, dentries_per_clu;
unsigned int type;
+ unsigned int clu_count = 0;
struct exfat_chain clu;
struct exfat_dentry *ep;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
@@ -920,11 +902,14 @@ static int exfat_check_dir_empty(struct super_block *sb,
dentries_per_clu = sbi->dentries_per_clu;
+ if (p_dir->dir == EXFAT_EOF_CLUSTER)
+ return 0;
+
exfat_chain_dup(&clu, p_dir);
while (clu.dir != EXFAT_EOF_CLUSTER) {
for (i = 0; i < dentries_per_clu; i++) {
- ep = exfat_get_dentry(sb, &clu, i, &bh, NULL);
+ ep = exfat_get_dentry(sb, &clu, i, &bh);
if (!ep)
return -EIO;
type = exfat_get_entry_type(ep);
@@ -946,6 +931,10 @@ static int exfat_check_dir_empty(struct super_block *sb,
} else {
if (exfat_get_next_cluster(sb, &(clu.dir)))
return -EIO;
+
+ /* break if the cluster chain includes a loop */
+ if (unlikely(++clu_count > EXFAT_DATA_CLUSTER_COUNT(sbi)))
+ break;
}
}
@@ -955,19 +944,17 @@ static int exfat_check_dir_empty(struct super_block *sb,
static int exfat_rmdir(struct inode *dir, struct dentry *dentry)
{
struct inode *inode = dentry->d_inode;
- struct exfat_dentry *ep;
- struct exfat_chain cdir, clu_to_free;
+ struct exfat_chain clu_to_free;
struct super_block *sb = inode->i_sb;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
struct exfat_inode_info *ei = EXFAT_I(inode);
- struct buffer_head *bh;
- sector_t sector;
- int num_entries, entry, err;
+ struct exfat_entry_set_cache es;
+ int err;
- mutex_lock(&EXFAT_SB(inode->i_sb)->s_lock);
+ if (unlikely(exfat_forced_shutdown(sb)))
+ return -EIO;
- exfat_chain_dup(&cdir, &ei->dir);
- entry = ei->entry;
+ mutex_lock(&EXFAT_SB(inode->i_sb)->s_lock);
if (ei->dir.dir == DIR_DELETED) {
exfat_err(sb, "abnormal access to deleted dentry");
@@ -975,7 +962,6 @@ static int exfat_rmdir(struct inode *dir, struct dentry *dentry)
goto unlock;
}
- exfat_set_vol_flags(sb, VOL_DIRTY);
exfat_chain_set(&clu_to_free, ei->start_clu,
EXFAT_B_TO_CLU_ROUND_UP(i_size_read(inode), sbi), ei->flags);
@@ -987,32 +973,25 @@ static int exfat_rmdir(struct inode *dir, struct dentry *dentry)
goto unlock;
}
- ep = exfat_get_dentry(sb, &cdir, entry, &bh, &sector);
- if (!ep) {
+ err = exfat_get_dentry_set_by_ei(&es, sb, ei);
+ if (err) {
err = -EIO;
goto unlock;
}
- num_entries = exfat_count_ext_entries(sb, &cdir, entry, ep);
- if (num_entries < 0) {
- err = -EIO;
- brelse(bh);
- goto unlock;
- }
- num_entries++;
- brelse(bh);
+ exfat_set_volume_dirty(sb);
- err = exfat_remove_entries(dir, &cdir, entry, 0, num_entries);
- if (err) {
- exfat_err(sb, "failed to exfat_remove_entries : err(%d)", err);
+ exfat_remove_entries(inode, &es, ES_IDX_FILE);
+
+ err = exfat_put_dentry_set(&es, IS_DIRSYNC(dir));
+ if (err)
goto unlock;
- }
+
ei->dir.dir = DIR_DELETED;
- exfat_set_vol_flags(sb, VOL_CLEAN);
inode_inc_iversion(dir);
- dir->i_mtime = dir->i_atime = current_time(dir);
- exfat_truncate_atime(&dir->i_atime);
+ simple_inode_init_ts(dir);
+ exfat_truncate_inode_atime(dir);
if (IS_DIRSYNC(dir))
exfat_sync_inode(dir);
else
@@ -1020,8 +999,8 @@ static int exfat_rmdir(struct inode *dir, struct dentry *dentry)
drop_nlink(dir);
clear_nlink(inode);
- inode->i_mtime = inode->i_atime = current_time(inode);
- exfat_truncate_atime(&inode->i_atime);
+ simple_inode_init_ts(inode);
+ exfat_truncate_inode_atime(inode);
exfat_unhash_inode(inode);
exfat_d_version_set(dentry, inode_query_iversion(dir));
unlock:
@@ -1029,182 +1008,128 @@ unlock:
return err;
}
-static int exfat_rename_file(struct inode *inode, struct exfat_chain *p_dir,
- int oldentry, struct exfat_uni_name *p_uniname,
- struct exfat_inode_info *ei)
+static int exfat_rename_file(struct inode *parent_inode,
+ struct exfat_uni_name *p_uniname, struct exfat_inode_info *ei)
{
- int ret, num_old_entries, num_new_entries;
- sector_t sector_old, sector_new;
+ int ret, num_new_entries;
struct exfat_dentry *epold, *epnew;
- struct super_block *sb = inode->i_sb;
- struct buffer_head *new_bh, *old_bh;
- int sync = IS_DIRSYNC(inode);
-
- epold = exfat_get_dentry(sb, p_dir, oldentry, &old_bh, &sector_old);
- if (!epold)
- return -EIO;
+ struct super_block *sb = parent_inode->i_sb;
+ struct exfat_entry_set_cache old_es, new_es;
+ int sync = IS_DIRSYNC(parent_inode);
- num_old_entries = exfat_count_ext_entries(sb, p_dir, oldentry, epold);
- if (num_old_entries < 0)
+ if (unlikely(exfat_forced_shutdown(sb)))
return -EIO;
- num_old_entries++;
num_new_entries = exfat_calc_num_entries(p_uniname);
if (num_new_entries < 0)
return num_new_entries;
- if (num_old_entries < num_new_entries) {
- int newentry;
+ ret = exfat_get_dentry_set_by_ei(&old_es, sb, ei);
+ if (ret) {
+ ret = -EIO;
+ return ret;
+ }
- newentry =
- exfat_find_empty_entry(inode, p_dir, num_new_entries);
- if (newentry < 0)
- return newentry; /* -EIO or -ENOSPC */
+ epold = exfat_get_dentry_cached(&old_es, ES_IDX_FILE);
- epnew = exfat_get_dentry(sb, p_dir, newentry, &new_bh,
- &sector_new);
- if (!epnew)
- return -EIO;
+ if (old_es.num_entries < num_new_entries) {
+ int newentry;
+ struct exfat_chain dir;
+
+ newentry = exfat_find_empty_entry(parent_inode, &dir,
+ num_new_entries, &new_es);
+ if (newentry < 0) {
+ ret = newentry; /* -EIO or -ENOSPC */
+ goto put_old_es;
+ }
- memcpy(epnew, epold, DENTRY_SIZE);
+ epnew = exfat_get_dentry_cached(&new_es, ES_IDX_FILE);
+ *epnew = *epold;
if (exfat_get_entry_type(epnew) == TYPE_FILE) {
- epnew->dentry.file.attr |= cpu_to_le16(ATTR_ARCHIVE);
- ei->attr |= ATTR_ARCHIVE;
+ epnew->dentry.file.attr |= cpu_to_le16(EXFAT_ATTR_ARCHIVE);
+ ei->attr |= EXFAT_ATTR_ARCHIVE;
}
- exfat_update_bh(sb, new_bh, sync);
- brelse(old_bh);
- brelse(new_bh);
-
- epold = exfat_get_dentry(sb, p_dir, oldentry + 1, &old_bh,
- &sector_old);
- epnew = exfat_get_dentry(sb, p_dir, newentry + 1, &new_bh,
- &sector_new);
- if (!epold || !epnew)
- return -EIO;
- memcpy(epnew, epold, DENTRY_SIZE);
- exfat_update_bh(sb, new_bh, sync);
- brelse(old_bh);
- brelse(new_bh);
+ epold = exfat_get_dentry_cached(&old_es, ES_IDX_STREAM);
+ epnew = exfat_get_dentry_cached(&new_es, ES_IDX_STREAM);
+ *epnew = *epold;
- ret = exfat_init_ext_entry(inode, p_dir, newentry,
- num_new_entries, p_uniname);
+ exfat_init_ext_entry(&new_es, num_new_entries, p_uniname);
+
+ ret = exfat_put_dentry_set(&new_es, sync);
if (ret)
- return ret;
+ goto put_old_es;
- exfat_remove_entries(inode, p_dir, oldentry, 0,
- num_old_entries);
+ exfat_remove_entries(parent_inode, &old_es, ES_IDX_FILE);
+ ei->dir = dir;
ei->entry = newentry;
} else {
if (exfat_get_entry_type(epold) == TYPE_FILE) {
- epold->dentry.file.attr |= cpu_to_le16(ATTR_ARCHIVE);
- ei->attr |= ATTR_ARCHIVE;
+ epold->dentry.file.attr |= cpu_to_le16(EXFAT_ATTR_ARCHIVE);
+ ei->attr |= EXFAT_ATTR_ARCHIVE;
}
- exfat_update_bh(sb, old_bh, sync);
- brelse(old_bh);
- ret = exfat_init_ext_entry(inode, p_dir, oldentry,
- num_new_entries, p_uniname);
- if (ret)
- return ret;
- exfat_remove_entries(inode, p_dir, oldentry, num_new_entries,
- num_old_entries);
+ exfat_remove_entries(parent_inode, &old_es, ES_IDX_FIRST_FILENAME + 1);
+ exfat_init_ext_entry(&old_es, num_new_entries, p_uniname);
}
- return 0;
+ return exfat_put_dentry_set(&old_es, sync);
+
+put_old_es:
+ exfat_put_dentry_set(&old_es, false);
+ return ret;
}
-static int exfat_move_file(struct inode *inode, struct exfat_chain *p_olddir,
- int oldentry, struct exfat_chain *p_newdir,
+static int exfat_move_file(struct inode *parent_inode,
struct exfat_uni_name *p_uniname, struct exfat_inode_info *ei)
{
- int ret, newentry, num_new_entries, num_old_entries;
- sector_t sector_mov, sector_new;
+ int ret, newentry, num_new_entries;
struct exfat_dentry *epmov, *epnew;
- struct super_block *sb = inode->i_sb;
- struct buffer_head *mov_bh, *new_bh;
-
- epmov = exfat_get_dentry(sb, p_olddir, oldentry, &mov_bh, &sector_mov);
- if (!epmov)
- return -EIO;
-
- /* check if the source and target directory is the same */
- if (exfat_get_entry_type(epmov) == TYPE_DIR &&
- le32_to_cpu(epmov->dentry.stream.start_clu) == p_newdir->dir)
- return -EINVAL;
-
- num_old_entries = exfat_count_ext_entries(sb, p_olddir, oldentry,
- epmov);
- if (num_old_entries < 0)
- return -EIO;
- num_old_entries++;
+ struct exfat_entry_set_cache mov_es, new_es;
+ struct exfat_chain newdir;
num_new_entries = exfat_calc_num_entries(p_uniname);
if (num_new_entries < 0)
return num_new_entries;
- newentry = exfat_find_empty_entry(inode, p_newdir, num_new_entries);
- if (newentry < 0)
- return newentry; /* -EIO or -ENOSPC */
-
- epnew = exfat_get_dentry(sb, p_newdir, newentry, &new_bh, &sector_new);
- if (!epnew)
+ ret = exfat_get_dentry_set_by_ei(&mov_es, parent_inode->i_sb, ei);
+ if (ret)
return -EIO;
- memcpy(epnew, epmov, DENTRY_SIZE);
+ newentry = exfat_find_empty_entry(parent_inode, &newdir,
+ num_new_entries, &new_es);
+ if (newentry < 0) {
+ ret = newentry; /* -EIO or -ENOSPC */
+ goto put_mov_es;
+ }
+
+ epmov = exfat_get_dentry_cached(&mov_es, ES_IDX_FILE);
+ epnew = exfat_get_dentry_cached(&new_es, ES_IDX_FILE);
+ *epnew = *epmov;
if (exfat_get_entry_type(epnew) == TYPE_FILE) {
- epnew->dentry.file.attr |= cpu_to_le16(ATTR_ARCHIVE);
- ei->attr |= ATTR_ARCHIVE;
+ epnew->dentry.file.attr |= cpu_to_le16(EXFAT_ATTR_ARCHIVE);
+ ei->attr |= EXFAT_ATTR_ARCHIVE;
}
- exfat_update_bh(sb, new_bh, IS_DIRSYNC(inode));
- brelse(mov_bh);
- brelse(new_bh);
-
- epmov = exfat_get_dentry(sb, p_olddir, oldentry + 1, &mov_bh,
- &sector_mov);
- epnew = exfat_get_dentry(sb, p_newdir, newentry + 1, &new_bh,
- &sector_new);
- if (!epmov || !epnew)
- return -EIO;
- memcpy(epnew, epmov, DENTRY_SIZE);
- exfat_update_bh(sb, new_bh, IS_DIRSYNC(inode));
- brelse(mov_bh);
- brelse(new_bh);
+ epmov = exfat_get_dentry_cached(&mov_es, ES_IDX_STREAM);
+ epnew = exfat_get_dentry_cached(&new_es, ES_IDX_STREAM);
+ *epnew = *epmov;
- ret = exfat_init_ext_entry(inode, p_newdir, newentry, num_new_entries,
- p_uniname);
- if (ret)
- return ret;
+ exfat_init_ext_entry(&new_es, num_new_entries, p_uniname);
+ exfat_remove_entries(parent_inode, &mov_es, ES_IDX_FILE);
- exfat_remove_entries(inode, p_olddir, oldentry, 0, num_old_entries);
+ ei->dir = newdir;
+ ei->entry = newentry;
- exfat_chain_set(&ei->dir, p_newdir->dir, p_newdir->size,
- p_newdir->flags);
+ ret = exfat_put_dentry_set(&new_es, IS_DIRSYNC(parent_inode));
+ if (ret)
+ goto put_mov_es;
- ei->entry = newentry;
- return 0;
-}
+ return exfat_put_dentry_set(&mov_es, IS_DIRSYNC(parent_inode));
-static void exfat_update_parent_info(struct exfat_inode_info *ei,
- struct inode *parent_inode)
-{
- struct exfat_sb_info *sbi = EXFAT_SB(parent_inode->i_sb);
- struct exfat_inode_info *parent_ei = EXFAT_I(parent_inode);
- loff_t parent_isize = i_size_read(parent_inode);
+put_mov_es:
+ exfat_put_dentry_set(&mov_es, false);
- /*
- * the problem that struct exfat_inode_info caches wrong parent info.
- *
- * because of flag-mismatch of ei->dir,
- * there is abnormal traversing cluster chain.
- */
- if (unlikely(parent_ei->flags != ei->dir.flags ||
- parent_isize != EXFAT_CLU_TO_B(ei->dir.size, sbi) ||
- parent_ei->start_clu != ei->dir.dir)) {
- exfat_chain_set(&ei->dir, parent_ei->start_clu,
- EXFAT_B_TO_CLU_ROUND_UP(parent_isize, sbi),
- parent_ei->flags);
- }
+ return ret;
}
/* rename or move a old file into a new file */
@@ -1213,20 +1138,12 @@ static int __exfat_rename(struct inode *old_parent_inode,
struct dentry *new_dentry)
{
int ret;
- int dentry;
- struct exfat_chain olddir, newdir;
- struct exfat_chain *p_dir = NULL;
struct exfat_uni_name uni_name;
- struct exfat_dentry *ep;
struct super_block *sb = old_parent_inode->i_sb;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
const unsigned char *new_path = new_dentry->d_name.name;
struct inode *new_inode = new_dentry->d_inode;
- int num_entries;
struct exfat_inode_info *new_ei = NULL;
- unsigned int new_entry_type = TYPE_UNUSED;
- int new_entry = 0;
- struct buffer_head *old_bh, *new_bh = NULL;
/* check the validity of pointer parameters */
if (new_path == NULL || strlen(new_path) == 0)
@@ -1237,18 +1154,6 @@ static int __exfat_rename(struct inode *old_parent_inode,
return -ENOENT;
}
- exfat_update_parent_info(ei, old_parent_inode);
-
- exfat_chain_dup(&olddir, &ei->dir);
- dentry = ei->entry;
-
- ep = exfat_get_dentry(sb, &olddir, dentry, &old_bh, NULL);
- if (!ep) {
- ret = -EIO;
- goto out;
- }
- brelse(old_bh);
-
/* check whether new dir is existing directory and empty */
if (new_inode) {
ret = -EIO;
@@ -1259,19 +1164,8 @@ static int __exfat_rename(struct inode *old_parent_inode,
goto out;
}
- exfat_update_parent_info(new_ei, new_parent_inode);
-
- p_dir = &(new_ei->dir);
- new_entry = new_ei->entry;
- ep = exfat_get_dentry(sb, p_dir, new_entry, &new_bh, NULL);
- if (!ep)
- goto out;
-
- new_entry_type = exfat_get_entry_type(ep);
- brelse(new_bh);
-
/* if new_inode exists, update ei */
- if (new_entry_type == TYPE_DIR) {
+ if (S_ISDIR(new_inode->i_mode)) {
struct exfat_chain new_clu;
new_clu.dir = new_ei->start_clu;
@@ -1287,43 +1181,36 @@ static int __exfat_rename(struct inode *old_parent_inode,
}
/* check the validity of directory name in the given new pathname */
- ret = exfat_resolve_path(new_parent_inode, new_path, &newdir,
- &uni_name);
+ ret = exfat_resolve_path(new_parent_inode, new_path, &uni_name);
if (ret)
goto out;
- exfat_set_vol_flags(sb, VOL_DIRTY);
+ exfat_set_volume_dirty(sb);
- if (olddir.dir == newdir.dir)
- ret = exfat_rename_file(new_parent_inode, &olddir, dentry,
- &uni_name, ei);
+ if (new_parent_inode == old_parent_inode)
+ ret = exfat_rename_file(new_parent_inode, &uni_name, ei);
else
- ret = exfat_move_file(new_parent_inode, &olddir, dentry,
- &newdir, &uni_name, ei);
+ ret = exfat_move_file(new_parent_inode, &uni_name, ei);
if (!ret && new_inode) {
+ struct exfat_entry_set_cache es;
+
/* delete entries of new_dir */
- ep = exfat_get_dentry(sb, p_dir, new_entry, &new_bh, NULL);
- if (!ep) {
+ ret = exfat_get_dentry_set_by_ei(&es, sb, new_ei);
+ if (ret) {
ret = -EIO;
goto del_out;
}
- num_entries = exfat_count_ext_entries(sb, p_dir, new_entry, ep);
- if (num_entries < 0) {
- ret = -EIO;
- goto del_out;
- }
- brelse(new_bh);
+ exfat_remove_entries(new_inode, &es, ES_IDX_FILE);
- if (exfat_remove_entries(new_inode, p_dir, new_entry, 0,
- num_entries + 1)) {
- ret = -EIO;
+ ret = exfat_put_dentry_set(&es, IS_DIRSYNC(new_inode));
+ if (ret)
goto del_out;
- }
/* Free the clusters if new_inode is a dir(as if exfat_rmdir) */
- if (new_entry_type == TYPE_DIR) {
+ if (S_ISDIR(new_inode->i_mode) &&
+ new_ei->start_clu != EXFAT_EOF_CLUSTER) {
/* new_ei, new_clu_to_free */
struct exfat_chain new_clu_to_free;
@@ -1337,6 +1224,7 @@ static int __exfat_rename(struct inode *old_parent_inode,
}
i_size_write(new_inode, 0);
+ new_ei->valid_size = 0;
new_ei->start_clu = EXFAT_EOF_CLUSTER;
new_ei->flags = ALLOC_NO_FAT_CHAIN;
}
@@ -1347,19 +1235,20 @@ del_out:
*/
new_ei->dir.dir = DIR_DELETED;
}
- exfat_set_vol_flags(sb, VOL_CLEAN);
out:
return ret;
}
-static int exfat_rename(struct inode *old_dir, struct dentry *old_dentry,
- struct inode *new_dir, struct dentry *new_dentry,
- unsigned int flags)
+static int exfat_rename(struct mnt_idmap *idmap,
+ struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry,
+ unsigned int flags)
{
struct inode *old_inode, *new_inode;
struct super_block *sb = old_dir->i_sb;
loff_t i_pos;
int err;
+ loff_t size = i_size_read(new_dir);
/*
* The VFS already checks for existence, so for local filesystems
@@ -1378,10 +1267,10 @@ static int exfat_rename(struct inode *old_dir, struct dentry *old_dentry,
goto unlock;
inode_inc_iversion(new_dir);
- new_dir->i_ctime = new_dir->i_mtime = new_dir->i_atime =
- EXFAT_I(new_dir)->i_crtime = current_time(new_dir);
- exfat_truncate_atime(&new_dir->i_atime);
- if (IS_DIRSYNC(new_dir))
+ simple_rename_timestamp(old_dir, old_dentry, new_dir, new_dentry);
+ EXFAT_I(new_dir)->i_crtime = current_time(new_dir);
+ exfat_truncate_inode_atime(new_dir);
+ if (IS_DIRSYNC(new_dir) && size != i_size_read(new_dir))
exfat_sync_inode(new_dir);
else
mark_inode_dirty(new_dir);
@@ -1402,10 +1291,7 @@ static int exfat_rename(struct inode *old_dir, struct dentry *old_dentry,
}
inode_inc_iversion(old_dir);
- old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir);
- if (IS_DIRSYNC(old_dir))
- exfat_sync_inode(old_dir);
- else
+ if (new_dir != old_dir)
mark_inode_dirty(old_dir);
if (new_inode) {
@@ -1420,8 +1306,7 @@ static int exfat_rename(struct inode *old_dir, struct dentry *old_dentry,
exfat_warn(sb, "abnormal access to an inode dropped");
WARN_ON(new_inode->i_nlink == 0);
}
- new_inode->i_ctime = EXFAT_I(new_inode)->i_crtime =
- current_time(new_inode);
+ EXFAT_I(new_inode)->i_crtime = current_time(new_inode);
}
unlock:
generated by cgit (git 2.34.1) at 2025-12-26 09:50:23 +0000