super.c (19139539207934aef6335bdef09c9e4bd70d1808) super.c (2b95a23c4f50c42fe85f0d345612075d0f2c3118)
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Simple file system for zoned block devices exposing zones as files.
4 *
5 * Copyright (C) 2019 Western Digital Corporation or its affiliates.
6 */
7#include <linux/module.h>
8#include <linux/pagemap.h>

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1030{
1031 struct zonefs_inode_info *zi = ZONEFS_I(inode);
1032 struct zonefs_sb_info *sbi = ZONEFS_SB(inode->i_sb);
1033 int ret = 0;
1034
1035 mutex_lock(&zi->i_truncate_mutex);
1036
1037 if (!zi->i_wr_refcnt) {
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Simple file system for zoned block devices exposing zones as files.
4 *
5 * Copyright (C) 2019 Western Digital Corporation or its affiliates.
6 */
7#include <linux/module.h>
8#include <linux/pagemap.h>

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1030{
1031 struct zonefs_inode_info *zi = ZONEFS_I(inode);
1032 struct zonefs_sb_info *sbi = ZONEFS_SB(inode->i_sb);
1033 int ret = 0;
1034
1035 mutex_lock(&zi->i_truncate_mutex);
1036
1037 if (!zi->i_wr_refcnt) {
1038 if (atomic_inc_return(&sbi->s_open_zones) > sbi->s_max_open_zones) {
1039 atomic_dec(&sbi->s_open_zones);
1038 unsigned int wro = atomic_inc_return(&sbi->s_wro_seq_files);
1039
1040 if (wro > sbi->s_max_wro_seq_files) {
1041 atomic_dec(&sbi->s_wro_seq_files);
1040 ret = -EBUSY;
1041 goto unlock;
1042 }
1043
1044 if (i_size_read(inode) < zi->i_max_size) {
1045 ret = zonefs_zone_mgmt(inode, REQ_OP_ZONE_OPEN);
1046 if (ret) {
1042 ret = -EBUSY;
1043 goto unlock;
1044 }
1045
1046 if (i_size_read(inode) < zi->i_max_size) {
1047 ret = zonefs_zone_mgmt(inode, REQ_OP_ZONE_OPEN);
1048 if (ret) {
1047 atomic_dec(&sbi->s_open_zones);
1049 atomic_dec(&sbi->s_wro_seq_files);
1048 goto unlock;
1049 }
1050 zi->i_flags |= ZONEFS_ZONE_OPEN;
1051 }
1052 }
1053
1054 zi->i_wr_refcnt++;
1055

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1103 if (zi->i_flags & ZONEFS_ZONE_OPEN &&
1104 !(sb->s_flags & SB_RDONLY)) {
1105 zonefs_warn(sb, "closing zone failed, remounting filesystem read-only\n");
1106 sb->s_flags |= SB_RDONLY;
1107 }
1108 }
1109 zi->i_flags &= ~ZONEFS_ZONE_OPEN;
1110dec:
1050 goto unlock;
1051 }
1052 zi->i_flags |= ZONEFS_ZONE_OPEN;
1053 }
1054 }
1055
1056 zi->i_wr_refcnt++;
1057

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1105 if (zi->i_flags & ZONEFS_ZONE_OPEN &&
1106 !(sb->s_flags & SB_RDONLY)) {
1107 zonefs_warn(sb, "closing zone failed, remounting filesystem read-only\n");
1108 sb->s_flags |= SB_RDONLY;
1109 }
1110 }
1111 zi->i_flags &= ~ZONEFS_ZONE_OPEN;
1112dec:
1111 atomic_dec(&sbi->s_open_zones);
1113 atomic_dec(&sbi->s_wro_seq_files);
1112 }
1113 mutex_unlock(&zi->i_truncate_mutex);
1114}
1115
1116static int zonefs_file_release(struct inode *inode, struct file *file)
1117{
1118 /*
1119 * If we explicitly open a zone we must close it again as well, but the

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1683 * interface constraints.
1684 */
1685 sb_set_blocksize(sb, bdev_zone_write_granularity(sb->s_bdev));
1686 sbi->s_zone_sectors_shift = ilog2(bdev_zone_sectors(sb->s_bdev));
1687 sbi->s_uid = GLOBAL_ROOT_UID;
1688 sbi->s_gid = GLOBAL_ROOT_GID;
1689 sbi->s_perm = 0640;
1690 sbi->s_mount_opts = ZONEFS_MNTOPT_ERRORS_RO;
1114 }
1115 mutex_unlock(&zi->i_truncate_mutex);
1116}
1117
1118static int zonefs_file_release(struct inode *inode, struct file *file)
1119{
1120 /*
1121 * If we explicitly open a zone we must close it again as well, but the

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1685 * interface constraints.
1686 */
1687 sb_set_blocksize(sb, bdev_zone_write_granularity(sb->s_bdev));
1688 sbi->s_zone_sectors_shift = ilog2(bdev_zone_sectors(sb->s_bdev));
1689 sbi->s_uid = GLOBAL_ROOT_UID;
1690 sbi->s_gid = GLOBAL_ROOT_GID;
1691 sbi->s_perm = 0640;
1692 sbi->s_mount_opts = ZONEFS_MNTOPT_ERRORS_RO;
1691 sbi->s_max_open_zones = bdev_max_open_zones(sb->s_bdev);
1692 atomic_set(&sbi->s_open_zones, 0);
1693 if (!sbi->s_max_open_zones &&
1693
1694 atomic_set(&sbi->s_wro_seq_files, 0);
1695 sbi->s_max_wro_seq_files = bdev_max_open_zones(sb->s_bdev);
1696 if (!sbi->s_max_wro_seq_files &&
1694 sbi->s_mount_opts & ZONEFS_MNTOPT_EXPLICIT_OPEN) {
1695 zonefs_info(sb, "No open zones limit. Ignoring explicit_open mount option\n");
1696 sbi->s_mount_opts &= ~ZONEFS_MNTOPT_EXPLICIT_OPEN;
1697 }
1698
1699 ret = zonefs_read_super(sb);
1700 if (ret)
1701 return ret;

--- 123 unchanged lines hidden --- 		1697 sbi->s_mount_opts & ZONEFS_MNTOPT_EXPLICIT_OPEN) {
1698 zonefs_info(sb, "No open zones limit. Ignoring explicit_open mount option\n");
1699 sbi->s_mount_opts &= ~ZONEFS_MNTOPT_EXPLICIT_OPEN;
1700 }
1701
1702 ret = zonefs_read_super(sb);
1703 if (ret)
1704 return ret;

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