From: Konstantin Komarovc <almaz.alexandrovich@paragon-software.com>
To: <ntfs3@lists.linux.dev>
Cc: <linux-kernel@vger.kernel.org>, <linux-fsdevel@vger.kernel.org>
Subject: [PATCH 01/16] fs/ntfs3: Improve alternative boot processing
Date: Wed, 6 Dec 2023 18:08:56 +0300 [thread overview]
Message-ID: <53c3c86f-c816-4747-9262-592c3ddc6660@paragon-software.com> (raw)
In-Reply-To: <00fd1558-fda5-421b-be43-7de69e32cb4e@paragon-software.com>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
---
fs/ntfs3/super.c | 35 +++++++++++++++++------------------
1 file changed, 17 insertions(+), 18 deletions(-)
diff --git a/fs/ntfs3/super.c b/fs/ntfs3/super.c
index 9153dffde950..09d61c6c90aa 100644
--- a/fs/ntfs3/super.c
+++ b/fs/ntfs3/super.c
@@ -866,6 +866,7 @@ static int ntfs_init_from_boot(struct super_block
*sb, u32 sector_size,
u16 fn, ao;
u8 cluster_bits;
u32 boot_off = 0;
+ sector_t boot_block = 0;
const char *hint = "Primary boot";
/* Save original dev_size. Used with alternative boot. */
@@ -873,11 +874,11 @@ static int ntfs_init_from_boot(struct super_block
*sb, u32 sector_size,
sbi->volume.blocks = dev_size >> PAGE_SHIFT;
- bh = ntfs_bread(sb, 0);
+read_boot:
+ bh = ntfs_bread(sb, boot_block);
if (!bh)
- return -EIO;
+ return boot_block ? -EINVAL : -EIO;
-check_boot:
err = -EINVAL;
/* Corrupted image; do not read OOB */
@@ -1108,26 +1109,24 @@ static int ntfs_init_from_boot(struct
super_block *sb, u32 sector_size,
}
out:
- if (err == -EINVAL && !bh->b_blocknr && dev_size0 > PAGE_SHIFT) {
+ brelse(bh);
+
+ if (err == -EINVAL && !boot_block && dev_size0 > PAGE_SHIFT) {
u32 block_size = min_t(u32, sector_size, PAGE_SIZE);
u64 lbo = dev_size0 - sizeof(*boot);
- /*
- * Try alternative boot (last sector)
- */
- brelse(bh);
-
- sb_set_blocksize(sb, block_size);
- bh = ntfs_bread(sb, lbo >> blksize_bits(block_size));
- if (!bh)
- return -EINVAL;
-
+ boot_block = lbo >> blksize_bits(block_size);
boot_off = lbo & (block_size - 1);
- hint = "Alternative boot";
- dev_size = dev_size0; /* restore original size. */
- goto check_boot;
+ if (boot_block && block_size >= boot_off + sizeof(*boot)) {
+ /*
+ * Try alternative boot (last sector)
+ */
+ sb_set_blocksize(sb, block_size);
+ hint = "Alternative boot";
+ dev_size = dev_size0; /* restore original size. */
+ goto read_boot;
+ }
}
- brelse(bh);
return err;
}
--
2.34.1
next prev parent reply other threads:[~2023-12-06 15:08 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-06 15:08 [PATCH 00/16] fs/ntfs3: Bugfix and refactoring Konstantin Komarovc
2023-12-06 15:08 ` Konstantin Komarovc [this message]
2023-12-06 15:09 ` [PATCH 02/16] fs/ntfs3: Modified fix directory element type detection Konstantin Komarovc
2023-12-06 15:10 ` [PATCH 03/16] fs/ntfs3: Improve ntfs_dir_count Konstantin Komarovc
2023-12-06 15:10 ` [PATCH 04/16] fs/ntfs3: Correct hard links updating when dealing with DOS neams Konstantin Komarovc
2023-12-06 15:11 ` [PATCH 05/16] fs/ntfs3: Print warning while fixing hard links count Konstantin Komarovc
2023-12-06 15:11 ` [PATCH 06/16] fs/ntfs3: Reduce stack usage Konstantin Komarovc
2023-12-06 15:12 ` [PATCH 07/16] fs/ntfs3: Fix multithreaded stress test Konstantin Komarovc
2023-12-06 15:12 ` [PATCH 08/16] fs/ntfs3: Fix detected field-spanning write (size 8) of single field "le->name" Konstantin Komarovc
2023-12-07 9:31 ` Geert Uytterhoeven
2023-12-06 15:12 ` [PATCH 09/16] fs/ntfs3: Correct use bh_read Konstantin Komarovc
2023-12-06 15:12 ` [PATCH 10/16] fs/ntfs3: Add file_modified Konstantin Komarovc
2023-12-06 15:13 ` [PATCH 11/16] fs/ntfs3: Drop suid and sgid bits as a part of fpunch Konstantin Komarovc
2023-12-06 15:13 ` [PATCH 12/16] fs/ntfs3: Implement super_operations::shutdown Konstantin Komarovc
2023-12-06 15:13 ` [PATCH 13/16] fs/ntfs3: ntfs3_forced_shutdown use int instead of bool Konstantin Komarovc
2023-12-06 15:14 ` [PATCH 14/16] fs/ntfs3: Add and fix comments Konstantin Komarovc
2023-12-06 15:14 ` [PATCH 15/16] fs/ntfs3: Add NULL ptr dereference checking at the end of attr_allocate_frame() Konstantin Komarovc
2023-12-06 15:14 ` [PATCH 16/16] fs/ntfs3: Fix c/mtime typo Konstantin Komarovc
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