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fs: hpfs: Initialize filesystem timestamp ranges

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Fill in the appropriate limits to avoid inconsistencies
in the vfs cached inode times when timestamps are
outside the permitted range.

Also change the local_to_gmt() to use time64_t instead
of time32_t.

Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Acked-by: Jeff Layton <jlayton@kernel.org>
Cc: mikulas@artax.karlin.mff.cuni.cz
This commit is contained in:
Deepa Dinamani 2019-07-01 17:09:38 -07:00
parent 028ca4db0a
commit cdd62b5b07
2 changed files with 4 additions and 4 deletions
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6
fs/hpfs/hpfs_fn.h
View File

@ -334,7 +334,7 @@ long hpfs_ioctl(struct file *file, unsigned cmd, unsigned long arg);
* local time (HPFS) to GMT (Unix) * local time (HPFS) to GMT (Unix)
*/ */
static inline time64_t local_to_gmt(struct super_block *s, time32_t t) static inline time64_t local_to_gmt(struct super_block *s, time64_t t)
{ {
extern struct timezone sys_tz; extern struct timezone sys_tz;
return t + sys_tz.tz_minuteswest * 60 + hpfs_sb(s)->sb_timeshift; return t + sys_tz.tz_minuteswest * 60 + hpfs_sb(s)->sb_timeshift;
@ -343,9 +343,7 @@ static inline time64_t local_to_gmt(struct super_block *s, time32_t t)
static inline time32_t gmt_to_local(struct super_block *s, time64_t t) static inline time32_t gmt_to_local(struct super_block *s, time64_t t)
{ {
extern struct timezone sys_tz; extern struct timezone sys_tz;
t = t - sys_tz.tz_minuteswest * 60 - hpfs_sb(s)->sb_timeshift; return t - sys_tz.tz_minuteswest * 60 - hpfs_sb(s)->sb_timeshift;
return clamp_t(time64_t, t, 0, U32_MAX);
} }
static inline time32_t local_get_seconds(struct super_block *s) static inline time32_t local_get_seconds(struct super_block *s)

2
fs/hpfs/super.c
View File

@ -614,6 +614,8 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent)
s->s_magic = HPFS_SUPER_MAGIC; s->s_magic = HPFS_SUPER_MAGIC;
s->s_op = &hpfs_sops; s->s_op = &hpfs_sops;
s->s_d_op = &hpfs_dentry_operations; s->s_d_op = &hpfs_dentry_operations;
s->s_time_min = local_to_gmt(s, 0);
s->s_time_max = local_to_gmt(s, U32_MAX);
sbi->sb_root = le32_to_cpu(superblock->root); sbi->sb_root = le32_to_cpu(superblock->root);
sbi->sb_fs_size = le32_to_cpu(superblock->n_sectors); sbi->sb_fs_size = le32_to_cpu(superblock->n_sectors);