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| author | Jan Kara <jack@suse.cz> | 2024-03-07 14:53:20 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-05-30 10:44:57 +0300 |
| commit | 4f702721c6b1933977cafdf6066bf305c44ea5d5 (patch) | |
| tree | 07b68ff236436991343e40ac1972884ae3202227 /fs | |
| parent | 83bd32a7a593330709550a802b9c10016699b830 (diff) | |
| download | linux-4f702721c6b1933977cafdf6066bf305c44ea5d5.tar.xz | |
ext4: avoid excessive credit estimate in ext4_tmpfile()
[ Upstream commit 35a1f12f0ca857fee1d7a04ef52cbd5f1f84de13 ]
A user with minimum journal size (1024 blocks these days) complained
about the following error triggered by generic/697 test in
ext4_tmpfile():
run fstests generic/697 at 2024-02-28 05:34:46
JBD2: vfstest wants too many credits credits:260 rsv_credits:0 max:256
EXT4-fs error (device loop0) in __ext4_new_inode:1083: error 28
Indeed the credit estimate in ext4_tmpfile() is huge.
EXT4_MAXQUOTAS_INIT_BLOCKS() is 219, then 10 credits from ext4_tmpfile()
itself and then ext4_xattr_credits_for_new_inode() adds more credits
needed for security attributes and ACLs. Now the
EXT4_MAXQUOTAS_INIT_BLOCKS() is in fact unnecessary because we've
already initialized quotas with dquot_init() shortly before and so
EXT4_MAXQUOTAS_TRANS_BLOCKS() is enough (which boils down to 3 credits).
Fixes: af51a2ac36d1 ("ext4: ->tmpfile() support")
Signed-off-by: Jan Kara <jack@suse.cz>
Tested-by: Luis Henriques <lhenriques@suse.de>
Tested-by: Disha Goel <disgoel@linux.ibm.com>
Link: https://lore.kernel.org/r/20240307115320.28949-1-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ext4/namei.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index 5e4f65c14dfb..a630b27a4cc6 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -2897,7 +2897,7 @@ retry: inode = ext4_new_inode_start_handle(idmap, dir, mode, NULL, 0, NULL, EXT4_HT_DIR, - EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb) + + EXT4_MAXQUOTAS_TRANS_BLOCKS(dir->i_sb) + 4 + EXT4_XATTR_TRANS_BLOCKS); handle = ext4_journal_current_handle(); err = PTR_ERR(inode); |