From: Chao Yu yuchao0@huawei.com
stable inclusion from stable-5.10.52 commit d3c150978ead8edf85dbd671bb8f864dd89612b3 bugzilla: 175542 https://gitee.com/openeuler/kernel/issues/I4DTKU
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 4a67d9b07ac8dce7f1034e0d887f2f4ee00fe118 ]
This patch restricts to configure compress extension as format of:
[filename + '.' + extension]
rather than:
[filename + '.' + extension + (optional: '.' + temp extension)]
in order to avoid to enable compression incorrectly:
1. compress_extension=so 2. touch file.soa 3. touch file.so.tmp
Fixes: 4c8ff7095bef ("f2fs: support data compression") Signed-off-by: Chao Yu yuchao0@huawei.com Signed-off-by: Jaegeuk Kim jaegeuk@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Chen Jun chenjun102@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com Signed-off-by: Chen Jun chenjun102@huawei.com --- fs/f2fs/namei.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c index 5f7ab4f11322..17d0e5f4efec 100644 --- a/fs/f2fs/namei.c +++ b/fs/f2fs/namei.c @@ -153,7 +153,8 @@ static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode) return ERR_PTR(err); }
-static inline int is_extension_exist(const unsigned char *s, const char *sub) +static inline int is_extension_exist(const unsigned char *s, const char *sub, + bool tmp_ext) { size_t slen = strlen(s); size_t sublen = strlen(sub); @@ -169,6 +170,13 @@ static inline int is_extension_exist(const unsigned char *s, const char *sub) if (slen < sublen + 2) return 0;
+ if (!tmp_ext) { + /* file has no temp extension */ + if (s[slen - sublen - 1] != '.') + return 0; + return !strncasecmp(s + slen - sublen, sub, sublen); + } + for (i = 1; i < slen - sublen; i++) { if (s[i] != '.') continue; @@ -194,7 +202,7 @@ static inline void set_file_temperature(struct f2fs_sb_info *sbi, struct inode * hot_count = sbi->raw_super->hot_ext_count;
for (i = 0; i < cold_count + hot_count; i++) { - if (is_extension_exist(name, extlist[i])) + if (is_extension_exist(name, extlist[i], true)) break; }
@@ -295,7 +303,7 @@ static void set_compress_inode(struct f2fs_sb_info *sbi, struct inode *inode, hot_count = sbi->raw_super->hot_ext_count;
for (i = cold_count; i < cold_count + hot_count; i++) { - if (is_extension_exist(name, extlist[i])) { + if (is_extension_exist(name, extlist[i], false)) { up_read(&sbi->sb_lock); return; } @@ -306,7 +314,7 @@ static void set_compress_inode(struct f2fs_sb_info *sbi, struct inode *inode, ext = F2FS_OPTION(sbi).extensions;
for (i = 0; i < ext_cnt; i++) { - if (!is_extension_exist(name, ext[i])) + if (!is_extension_exist(name, ext[i], false)) continue;
set_compress_context(inode);