2.6.32-longterm review patch. If anyone has any objections, please let me know.
------------------ From: Kevin Dankwardt <[email protected]> commit eeb5b4ae81f4a750355fa0c15f4fea22fdf83be1 upstream. I found that the length of a file name when created cannot exceed 255 characters, yet, pathconf(), via statfs(), returns the maximum as 260. Signed-off-by: Kevin Dankwardt <[email protected]> Signed-off-by: OGAWA Hirofumi <[email protected]> Signed-off-by: Willy Tarreau <[email protected]> --- fs/fat/inode.c | 2 +- fs/fat/namei_vfat.c | 6 +++--- include/linux/msdos_fs.h | 3 ++- 3 files changed, 6 insertions(+), 5 deletions(-) diff --git a/fs/fat/inode.c b/fs/fat/inode.c index 76b7961..c187e92 100644 --- a/fs/fat/inode.c +++ b/fs/fat/inode.c @@ -558,7 +558,7 @@ static int fat_statfs(struct dentry *dentry, struct kstatfs *buf) buf->f_bavail = sbi->free_clusters; buf->f_fsid.val[0] = (u32)id; buf->f_fsid.val[1] = (u32)(id >> 32); - buf->f_namelen = sbi->options.isvfat ? 260 : 12; + buf->f_namelen = sbi->options.isvfat ? FAT_LFN_LEN : 12; return 0; } diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c index 72646e2..67b3df1 100644 --- a/fs/fat/namei_vfat.c +++ b/fs/fat/namei_vfat.c @@ -502,14 +502,14 @@ xlate_to_uni(const unsigned char *name, int len, unsigned char *outname, *outlen = utf8s_to_utf16s(name, len, (wchar_t *)outname); if (*outlen < 0) return *outlen; - else if (*outlen > 255) + else if (*outlen > FAT_LFN_LEN) return -ENAMETOOLONG; op = &outname[*outlen * sizeof(wchar_t)]; } else { if (nls) { for (i = 0, ip = name, op = outname, *outlen = 0; - i < len && *outlen <= 255; + i < len && *outlen <= FAT_LFN_LEN; *outlen += 1) { if (escape && (*ip == ':')) { @@ -549,7 +549,7 @@ xlate_to_uni(const unsigned char *name, int len, unsigned char *outname, return -ENAMETOOLONG; } else { for (i = 0, ip = name, op = outname, *outlen = 0; - i < len && *outlen <= 255; + i < len && *outlen <= FAT_LFN_LEN; i++, *outlen += 1) { *op++ = *ip++; diff --git a/include/linux/msdos_fs.h b/include/linux/msdos_fs.h index ce38f1c..34066e6 100644 --- a/include/linux/msdos_fs.h +++ b/include/linux/msdos_fs.h @@ -15,6 +15,7 @@ #define MSDOS_DPB_BITS 4 /* log2(MSDOS_DPB) */ #define MSDOS_DPS (SECTOR_SIZE / sizeof(struct msdos_dir_entry)) #define MSDOS_DPS_BITS 4 /* log2(MSDOS_DPS) */ +#define MSDOS_LONGNAME 256 /* maximum name length */ #define CF_LE_W(v) le16_to_cpu(v) #define CF_LE_L(v) le32_to_cpu(v) #define CT_LE_W(v) cpu_to_le16(v) @@ -47,8 +48,8 @@ #define DELETED_FLAG 0xe5 /* marks file as deleted when in name[0] */ #define IS_FREE(n) (!*(n) || *(n) == DELETED_FLAG) +#define FAT_LFN_LEN 255 /* maximum long name length */ #define MSDOS_NAME 11 /* maximum name length */ -#define MSDOS_LONGNAME 256 /* maximum name length */ #define MSDOS_SLOTS 21 /* max # of slots for short and long names */ #define MSDOS_DOT ". " /* ".", padded to MSDOS_NAME chars */ #define MSDOS_DOTDOT ".. " /* "..", padded to MSDOS_NAME chars */ -- 1.7.12.2.21.g234cd45.dirty -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
