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Thu, 25 Jun 2026 08:29:56 -0700 From: Yun Zhou To: , , , , , , , , CC: , , , Subject: [PATCH v10 4/5] ext4: remove ea_inode_array mechanism in favor of ext4_put_ea_inode() Date: Thu, 25 Jun 2026 23:29:40 +0800 Message-ID: <20260625152941.24788-5-yun.zhou@windriver.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260625152941.24788-1-yun.zhou@windriver.com> References: <20260625152941.24788-1-yun.zhou@windriver.com> Precedence: bulk X-Mailing-List: linux-ext4@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjI1MDEzMyBTYWx0ZWRfX0RXCS28v+UL4 0jplA7EJKXD1QzXqJMwd0OPcqkHhEy7BcO/ClA3rylxGIIhuH5ow5eGPAm62e7CEvkeenbSxZzF gryI1h0XG4QsDCuv6Bh6p0WZDMOKGJCO5EiAyctzekHTGuCNS/V7fkAugJCTprhDtVqflf27bl7 tS2SCMqJ36g5w8Dn6od29KoKPMLtQFn5hM2EiIL8M9lCKfAzYEXlp/tu+3qM9vno4AnWomYx10I gRw3DuzpBNiUdERWL4AvOzVyKeon+Tugq7j0RX0SDZiEV/L5/pisQSZh/d4kjyhgCAiWKTj+0/H vRbesIhXOz4aCLwFpLIudkPAcKEi9zhXIU7TNST2BwcaWk+zVUZyYtvNVLlSZ4zitUARs7Uu0uz cGRyQsMLlaprIFYx3vMU1Ja0/cv6DHvcXk9PUtgOZu9YT52q9MQzX3Z0LhHq7h8fKMd1dVFv2LL rZKopGHXY5Fnl6m5Tzg== X-Proofpoint-GUID: YExbDbHA0Mhn_E7BOHFYFoOjpHd5Z6WB X-Proofpoint-ORIG-GUID: YExbDbHA0Mhn_E7BOHFYFoOjpHd5Z6WB X-Authority-Analysis: v=2.4 cv=U4Oiy+ru c=1 sm=1 tr=0 ts=6a3d497b cx=c_pps a=Lg6ja3A245NiLSnFpY5YKQ==:117 a=Lg6ja3A245NiLSnFpY5YKQ==:17 a=FelO9ux0wxsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=bi6dqmuHe4P4UrxVR6um:22 a=klDOsUkWDRETUCZYPvoE:22 a=t7CeM3EgAAAA:8 a=9aDgUxOzpnIOwVdy1lkA:9 a=FdTzh2GWekK77mhwV6Dw:22 X-Proofpoint-Spam-Info: AW1haW4tMjYwNjI1MDEzMyBTYWx0ZWRfX8jMIwkxNRqBD FlCh7NqmlitvTL8gFz8bvt59GZl/wr79CybTyRHEJ6oUUQYitHzgyVnXADmyklBoRiG/gTHr3QY maHu3/hT42D5oGifvJs+Y/N0ITRDDr0JZhytjWo6IEa51yhMNaAs X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-25_01,2026-06-24_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 phishscore=0 adultscore=0 malwarescore=0 clxscore=1015 lowpriorityscore=0 spamscore=0 priorityscore=1501 bulkscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2606250133 Now that ext4_put_ea_inode() handles deferred iput safely for all cases (using iput_if_not_last + embedded llist_node), the ea_inode_array mechanism for batching deferred iputs is redundant. Remove: - ext4_expand_inode_array() and ext4_xattr_inode_array_free() - ext4_xattr_inode_array_free_deferred() - struct ext4_xattr_inode_array and EIA_INCR/EIA_MASK defines - ea_inode_array parameter from ext4_xattr_inode_dec_ref_all(), ext4_xattr_release_block(), and ext4_xattr_delete_inode() - ea_inode_array variable from ext4_evict_inode() Instead, ext4_xattr_inode_dec_ref_all() now calls ext4_put_ea_inode() directly after processing each EA inode. This simplifies the code by eliminating multi-layer parameter threading and removes the need for callers to manage array lifetime. Signed-off-by: Yun Zhou Suggested-by: Jan Kara --- fs/ext4/inode.c | 6 +--- fs/ext4/xattr.c | 95 +++---------------------------------------------- fs/ext4/xattr.h | 7 ---- 3 files changed, 6 insertions(+), 102 deletions(-) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 0d131371ad3d..6f1b84e46a2e 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -176,7 +176,6 @@ void ext4_evict_inode(struct inode *inode) * (xattr block freeing), bitmap, group descriptor (inode freeing) */ int extra_credits = 6; - struct ext4_xattr_inode_array *ea_inode_array = NULL; bool freeze_protected = false; trace_ext4_evict_inode(inode); @@ -282,8 +281,7 @@ void ext4_evict_inode(struct inode *inode) } /* Remove xattr references. */ - err = ext4_xattr_delete_inode(handle, inode, &ea_inode_array, - extra_credits); + err = ext4_xattr_delete_inode(handle, inode, extra_credits); if (err) { ext4_warning(inode->i_sb, "xattr delete (err %d)", err); stop_handle: @@ -291,7 +289,6 @@ void ext4_evict_inode(struct inode *inode) ext4_orphan_del(NULL, inode); if (freeze_protected) sb_end_intwrite(inode->i_sb); - ext4_xattr_inode_array_free(ea_inode_array); goto no_delete; } @@ -321,7 +318,6 @@ void ext4_evict_inode(struct inode *inode) ext4_journal_stop(handle); if (freeze_protected) sb_end_intwrite(inode->i_sb); - ext4_xattr_inode_array_free(ea_inode_array); return; no_delete: /* diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c index 90b693b78a45..7f334349bd4f 100644 --- a/fs/ext4/xattr.c +++ b/fs/ext4/xattr.c @@ -114,12 +114,6 @@ const struct xattr_handler * const ext4_xattr_handlers[] = { #define EA_INODE_CACHE(inode) (((struct ext4_sb_info *) \ inode->i_sb->s_fs_info)->s_ea_inode_cache) -static int -ext4_expand_inode_array(struct ext4_xattr_inode_array **ea_inode_array, - struct inode *inode); -static void ext4_xattr_inode_array_free_deferred(struct super_block *sb, - struct ext4_xattr_inode_array *array); - #ifdef CONFIG_LOCKDEP void ext4_xattr_inode_set_class(struct inode *ea_inode) { @@ -1162,7 +1156,6 @@ static void ext4_xattr_inode_dec_ref_all(handle_t *handle, struct inode *parent, struct buffer_head *bh, struct ext4_xattr_entry *first, bool block_csum, - struct ext4_xattr_inode_array **ea_inode_array, int extra_credits, bool skip_quota) { struct inode *ea_inode; @@ -1199,14 +1192,6 @@ ext4_xattr_inode_dec_ref_all(handle_t *handle, struct inode *parent, if (err) continue; - err = ext4_expand_inode_array(ea_inode_array, ea_inode); - if (err) { - ext4_warning_inode(ea_inode, - "Expand inode array err=%d", err); - ext4_put_ea_inode(parent->i_sb, ea_inode); - continue; - } - err = ext4_journal_ensure_credits_fn(handle, credits, credits, ext4_free_metadata_revoke_credits(parent->i_sb, 1), ext4_xattr_restart_fn(handle, parent, bh, block_csum, @@ -1214,6 +1199,7 @@ ext4_xattr_inode_dec_ref_all(handle_t *handle, struct inode *parent, if (err < 0) { ext4_warning_inode(ea_inode, "Ensure credits err=%d", err); + ext4_put_ea_inode(parent->i_sb, ea_inode); continue; } if (err > 0) { @@ -1223,6 +1209,7 @@ ext4_xattr_inode_dec_ref_all(handle_t *handle, struct inode *parent, ext4_warning_inode(ea_inode, "Re-get write access err=%d", err); + ext4_put_ea_inode(parent->i_sb, ea_inode); continue; } } @@ -1231,6 +1218,7 @@ ext4_xattr_inode_dec_ref_all(handle_t *handle, struct inode *parent, if (err) { ext4_warning_inode(ea_inode, "ea_inode dec ref err=%d", err); + ext4_put_ea_inode(parent->i_sb, ea_inode); continue; } @@ -1247,6 +1235,7 @@ ext4_xattr_inode_dec_ref_all(handle_t *handle, struct inode *parent, entry->e_value_inum = 0; entry->e_value_size = 0; + ext4_put_ea_inode(parent->i_sb, ea_inode); dirty = true; } @@ -1273,7 +1262,6 @@ ext4_xattr_inode_dec_ref_all(handle_t *handle, struct inode *parent, static void ext4_xattr_release_block(handle_t *handle, struct inode *inode, struct buffer_head *bh, - struct ext4_xattr_inode_array **ea_inode_array, int extra_credits) { struct mb_cache *ea_block_cache = EA_BLOCK_CACHE(inode); @@ -1315,7 +1303,6 @@ ext4_xattr_release_block(handle_t *handle, struct inode *inode, ext4_xattr_inode_dec_ref_all(handle, inode, bh, BFIRST(bh), true /* block_csum */, - ea_inode_array, extra_credits, true /* skip_quota */); ext4_free_blocks(handle, inode, bh, 0, 1, @@ -2184,13 +2171,8 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode, /* Drop the previous xattr block. */ if (bs->bh && bs->bh != new_bh) { - struct ext4_xattr_inode_array *ea_inode_array = NULL; - ext4_xattr_release_block(handle, inode, bs->bh, - &ea_inode_array, 0 /* extra_credits */); - ext4_xattr_inode_array_free_deferred(inode->i_sb, - ea_inode_array); } error = 0; @@ -2866,46 +2848,6 @@ int ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize, return error; } -#define EIA_INCR 16 /* must be 2^n */ -#define EIA_MASK (EIA_INCR - 1) - -/* Add the large xattr @inode into @ea_inode_array for deferred iput(). - * If @ea_inode_array is new or full it will be grown and the old - * contents copied over. - */ -static int -ext4_expand_inode_array(struct ext4_xattr_inode_array **ea_inode_array, - struct inode *inode) -{ - if (*ea_inode_array == NULL) { - /* - * Start with 15 inodes, so it fits into a power-of-two size. - */ - (*ea_inode_array) = kmalloc_flex(**ea_inode_array, inodes, - EIA_MASK, GFP_NOFS); - if (*ea_inode_array == NULL) - return -ENOMEM; - (*ea_inode_array)->count = 0; - } else if (((*ea_inode_array)->count & EIA_MASK) == EIA_MASK) { - /* expand the array once all 15 + n * 16 slots are full */ - struct ext4_xattr_inode_array *new_array = NULL; - - new_array = kmalloc_flex(**ea_inode_array, inodes, - (*ea_inode_array)->count + EIA_INCR, - GFP_NOFS); - if (new_array == NULL) - return -ENOMEM; - memcpy(new_array, *ea_inode_array, - struct_size(*ea_inode_array, inodes, - (*ea_inode_array)->count)); - kfree(*ea_inode_array); - *ea_inode_array = new_array; - } - (*ea_inode_array)->count++; - (*ea_inode_array)->inodes[(*ea_inode_array)->count - 1] = inode; - return 0; -} - /* * ext4_xattr_delete_inode() * @@ -2916,7 +2858,6 @@ ext4_expand_inode_array(struct ext4_xattr_inode_array **ea_inode_array, * references on xattr block and xattr inodes. */ int ext4_xattr_delete_inode(handle_t *handle, struct inode *inode, - struct ext4_xattr_inode_array **ea_inode_array, int extra_credits) { struct buffer_head *bh = NULL; @@ -2955,7 +2896,6 @@ int ext4_xattr_delete_inode(handle_t *handle, struct inode *inode, ext4_xattr_inode_dec_ref_all(handle, inode, iloc.bh, IFIRST(header), false /* block_csum */, - ea_inode_array, extra_credits, false /* skip_quota */); } @@ -2994,7 +2934,7 @@ int ext4_xattr_delete_inode(handle_t *handle, struct inode *inode, } - ext4_xattr_release_block(handle, inode, bh, ea_inode_array, + ext4_xattr_release_block(handle, inode, bh, extra_credits); /* * Update i_file_acl value in the same transaction that releases @@ -3016,31 +2956,6 @@ int ext4_xattr_delete_inode(handle_t *handle, struct inode *inode, return error; } -void ext4_xattr_inode_array_free(struct ext4_xattr_inode_array *ea_inode_array) -{ - int idx; - - if (ea_inode_array == NULL) - return; - - for (idx = 0; idx < ea_inode_array->count; ++idx) - iput(ea_inode_array->inodes[idx]); - kfree(ea_inode_array); -} - -static void ext4_xattr_inode_array_free_deferred(struct super_block *sb, - struct ext4_xattr_inode_array *array) -{ - int idx; - - if (array == NULL) - return; - - for (idx = 0; idx < array->count; ++idx) - ext4_put_ea_inode(sb, array->inodes[idx]); - kfree(array); -} - /* * Worker function for deferred EA inode iput. Processes all inodes queued * on s_ea_inode_to_free in a context free of xattr_sem/jbd2 handle locks. diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h index 9883ba5569a1..8214a31fe001 100644 --- a/fs/ext4/xattr.h +++ b/fs/ext4/xattr.h @@ -131,11 +131,6 @@ struct ext4_xattr_ibody_find { struct ext4_iloc iloc; }; -struct ext4_xattr_inode_array { - unsigned int count; - struct inode *inodes[] __counted_by(count); -}; - extern const struct xattr_handler ext4_xattr_user_handler; extern const struct xattr_handler ext4_xattr_trusted_handler; extern const struct xattr_handler ext4_xattr_security_handler; @@ -187,9 +182,7 @@ extern int __ext4_xattr_set_credits(struct super_block *sb, struct inode *inode, bool is_create); extern int ext4_xattr_delete_inode(handle_t *handle, struct inode *inode, - struct ext4_xattr_inode_array **array, int extra_credits); -extern void ext4_xattr_inode_array_free(struct ext4_xattr_inode_array *array); extern void ext4_init_ea_inode_work(struct ext4_sb_info *sbi); extern void ext4_put_ea_inode(struct super_block *sb, struct inode *inode); -- 2.43.0