diff options
Diffstat (limited to 'fs/fat/namei_vfat.c')
| -rw-r--r-- | fs/fat/namei_vfat.c | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c index f565f24019b5..c1ef50154868 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++; @@ -701,6 +701,15 @@ static int vfat_find(struct inode *dir, struct qstr *qname, return fat_search_long(dir, qname->name, len, sinfo); } +/* + * (nfsd's) anonymous disconnected dentry? + * NOTE: !IS_ROOT() is not anonymous (I.e. d_splice_alias() did the job). + */ +static int vfat_d_anon_disconn(struct dentry *dentry) +{ + return IS_ROOT(dentry) && (dentry->d_flags & DCACHE_DISCONNECTED); +} + static struct dentry *vfat_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) { @@ -729,11 +738,11 @@ static struct dentry *vfat_lookup(struct inode *dir, struct dentry *dentry, } alias = d_find_alias(inode); - if (alias && !(alias->d_flags & DCACHE_DISCONNECTED)) { + if (alias && !vfat_d_anon_disconn(alias)) { /* - * This inode has non DCACHE_DISCONNECTED dentry. This - * means, the user did ->lookup() by an another name - * (longname vs 8.3 alias of it) in past. + * This inode has non anonymous-DCACHE_DISCONNECTED + * dentry. This means, the user did ->lookup() by an + * another name (longname vs 8.3 alias of it) in past. * * Switch to new one for reason of locality if possible. */ @@ -743,7 +752,9 @@ static struct dentry *vfat_lookup(struct inode *dir, struct dentry *dentry, iput(inode); unlock_super(sb); return alias; - } + } else + dput(alias); + out: unlock_super(sb); dentry->d_op = sb->s_root->d_op; |