super.c (47e4937a4a7ca4184fd282791dfee76c6799966a) super.c (8d8a09b093d7073465c824f74caf315c073d3875)
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2017-2018 HUAWEI, Inc.
4 * http://www.huawei.com/
5 * Created by Gao Xiang <gaoxiang25@huawei.com>
6 */
7#include <linux/module.h>
8#include <linux/buffer_head.h>

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102 ret = -EINVAL;
103 if (le32_to_cpu(layout->magic) != EROFS_SUPER_MAGIC_V1) {
104 errln("cannot find valid erofs superblock");
105 goto out;
106 }
107
108 blkszbits = layout->blkszbits;
109 /* 9(512 bytes) + LOG_SECTORS_PER_BLOCK == LOG_BLOCK_SIZE */
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2017-2018 HUAWEI, Inc.
4 * http://www.huawei.com/
5 * Created by Gao Xiang <gaoxiang25@huawei.com>
6 */
7#include <linux/module.h>
8#include <linux/buffer_head.h>

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102 ret = -EINVAL;
103 if (le32_to_cpu(layout->magic) != EROFS_SUPER_MAGIC_V1) {
104 errln("cannot find valid erofs superblock");
105 goto out;
106 }
107
108 blkszbits = layout->blkszbits;
109 /* 9(512 bytes) + LOG_SECTORS_PER_BLOCK == LOG_BLOCK_SIZE */
110 if (unlikely(blkszbits != LOG_BLOCK_SIZE)) {
110 if (blkszbits != LOG_BLOCK_SIZE) {
111 errln("blksize %u isn't supported on this platform",
112 1 << blkszbits);
113 goto out;
114 }
115
116 if (!check_layout_compatibility(sb, layout))
117 goto out;
118

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374 .invalidatepage = managed_cache_invalidatepage,
375};
376
377static int erofs_init_managed_cache(struct super_block *sb)
378{
379 struct erofs_sb_info *const sbi = EROFS_SB(sb);
380 struct inode *const inode = new_inode(sb);
381
111 errln("blksize %u isn't supported on this platform",
112 1 << blkszbits);
113 goto out;
114 }
115
116 if (!check_layout_compatibility(sb, layout))
117 goto out;
118

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374 .invalidatepage = managed_cache_invalidatepage,
375};
376
377static int erofs_init_managed_cache(struct super_block *sb)
378{
379 struct erofs_sb_info *const sbi = EROFS_SB(sb);
380 struct inode *const inode = new_inode(sb);
381
382 if (unlikely(!inode))
382 if (!inode)
383 return -ENOMEM;
384
385 set_nlink(inode, 1);
386 inode->i_size = OFFSET_MAX;
387
388 inode->i_mapping->a_ops = &managed_cache_aops;
389 mapping_set_gfp_mask(inode->i_mapping,
390 GFP_NOFS | __GFP_HIGHMEM | __GFP_MOVABLE);

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401 struct erofs_sb_info *sbi;
402 int err;
403
404 infoln("fill_super, device -> %s", sb->s_id);
405 infoln("options -> %s", (char *)data);
406
407 sb->s_magic = EROFS_SUPER_MAGIC;
408
383 return -ENOMEM;
384
385 set_nlink(inode, 1);
386 inode->i_size = OFFSET_MAX;
387
388 inode->i_mapping->a_ops = &managed_cache_aops;
389 mapping_set_gfp_mask(inode->i_mapping,
390 GFP_NOFS | __GFP_HIGHMEM | __GFP_MOVABLE);

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401 struct erofs_sb_info *sbi;
402 int err;
403
404 infoln("fill_super, device -> %s", sb->s_id);
405 infoln("options -> %s", (char *)data);
406
407 sb->s_magic = EROFS_SUPER_MAGIC;
408
409 if (unlikely(!sb_set_blocksize(sb, EROFS_BLKSIZ))) {
409 if (!sb_set_blocksize(sb, EROFS_BLKSIZ)) {
410 errln("failed to set erofs blksize");
411 return -EINVAL;
412 }
413
414 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
410 errln("failed to set erofs blksize");
411 return -EINVAL;
412 }
413
414 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
415 if (unlikely(!sbi))
415 if (!sbi)
416 return -ENOMEM;
417
418 sb->s_fs_info = sbi;
419 err = superblock_read(sb);
420 if (err)
421 return err;
422
423 sb->s_flags |= SB_RDONLY | SB_NOATIME;

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428
429#ifdef CONFIG_EROFS_FS_XATTR
430 sb->s_xattr = erofs_xattr_handlers;
431#endif
432 /* set erofs default mount options */
433 default_options(sbi);
434
435 err = parse_options(sb, data);
416 return -ENOMEM;
417
418 sb->s_fs_info = sbi;
419 err = superblock_read(sb);
420 if (err)
421 return err;
422
423 sb->s_flags |= SB_RDONLY | SB_NOATIME;

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428
429#ifdef CONFIG_EROFS_FS_XATTR
430 sb->s_xattr = erofs_xattr_handlers;
431#endif
432 /* set erofs default mount options */
433 default_options(sbi);
434
435 err = parse_options(sb, data);
436 if (unlikely(err))
436 if (err)
437 return err;
438
439 if (!silent)
440 infoln("root inode @ nid %llu", ROOT_NID(sbi));
441
442 if (test_opt(sbi, POSIX_ACL))
443 sb->s_flags |= SB_POSIXACL;
444 else
445 sb->s_flags &= ~SB_POSIXACL;
446
447#ifdef CONFIG_EROFS_FS_ZIP
448 INIT_RADIX_TREE(&sbi->workstn_tree, GFP_ATOMIC);
449#endif
450
451 /* get the root inode */
452 inode = erofs_iget(sb, ROOT_NID(sbi), true);
453 if (IS_ERR(inode))
454 return PTR_ERR(inode);
455
437 return err;
438
439 if (!silent)
440 infoln("root inode @ nid %llu", ROOT_NID(sbi));
441
442 if (test_opt(sbi, POSIX_ACL))
443 sb->s_flags |= SB_POSIXACL;
444 else
445 sb->s_flags &= ~SB_POSIXACL;
446
447#ifdef CONFIG_EROFS_FS_ZIP
448 INIT_RADIX_TREE(&sbi->workstn_tree, GFP_ATOMIC);
449#endif
450
451 /* get the root inode */
452 inode = erofs_iget(sb, ROOT_NID(sbi), true);
453 if (IS_ERR(inode))
454 return PTR_ERR(inode);
455
456 if (unlikely(!S_ISDIR(inode->i_mode))) {
456 if (!S_ISDIR(inode->i_mode)) {
457 errln("rootino(nid %llu) is not a directory(i_mode %o)",
458 ROOT_NID(sbi), inode->i_mode);
459 iput(inode);
460 return -EINVAL;
461 }
462
463 sb->s_root = d_make_root(inode);
457 errln("rootino(nid %llu) is not a directory(i_mode %o)",
458 ROOT_NID(sbi), inode->i_mode);
459 iput(inode);
460 return -EINVAL;
461 }
462
463 sb->s_root = d_make_root(inode);
464 if (unlikely(!sb->s_root))
464 if (!sb->s_root)
465 return -ENOMEM;
466
467 erofs_shrinker_register(sb);
468 /* sb->s_umount is already locked, SB_ACTIVE and SB_BORN are not set */
469 err = erofs_init_managed_cache(sb);
465 return -ENOMEM;
466
467 erofs_shrinker_register(sb);
468 /* sb->s_umount is already locked, SB_ACTIVE and SB_BORN are not set */
469 err = erofs_init_managed_cache(sb);
470 if (unlikely(err))
470 if (err)
471 return err;
472
473 if (!silent)
474 infoln("mounted on %s with opts: %s.", sb->s_id, (char *)data);
475 return 0;
476}
477
478static struct dentry *erofs_mount(struct file_system_type *fs_type, int flags,

--- 191 unchanged lines hidden --- 		471 return err;
472
473 if (!silent)
474 infoln("mounted on %s with opts: %s.", sb->s_id, (char *)data);
475 return 0;
476}
477
478static struct dentry *erofs_mount(struct file_system_type *fs_type, int flags,

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