Add a mount option 'fsc' to enable local caching on CIFS. I considered adding a separate debug bit for caching, but it appears that debugging would be relatively easier with the normal CIFS_INFO level.
As the cifs-utils (userspace) changes are not done yet, this patch enables 'fsc' by default to enable testing. Signed-off-by: Suresh Jayaraman <[email protected]> Acked-by: David Howells <[email protected]> --- fs/cifs/cifs_fs_sb.h | 1 + fs/cifs/connect.c | 8 ++++++++ 2 files changed, 9 insertions(+) Index: cifs-2.6/fs/cifs/cifs_fs_sb.h =================================================================== --- cifs-2.6.orig/fs/cifs/cifs_fs_sb.h +++ cifs-2.6/fs/cifs/cifs_fs_sb.h @@ -35,6 +35,7 @@ #define CIFS_MOUNT_DYNPERM 0x1000 /* allow in-memory only mode setting */ #define CIFS_MOUNT_NOPOSIXBRL 0x2000 /* mandatory not posix byte range lock */ #define CIFS_MOUNT_NOSSYNC 0x4000 /* don't do slow SMBflush on every sync*/ +#define CIFS_MOUNT_FSCACHE 0x8000 /* local caching enabled */ struct cifs_sb_info { struct cifsTconInfo *tcon; /* primary mount */ Index: cifs-2.6/fs/cifs/connect.c =================================================================== --- cifs-2.6.orig/fs/cifs/connect.c +++ cifs-2.6/fs/cifs/connect.c @@ -98,6 +98,7 @@ struct smb_vol { bool noblocksnd:1; bool noautotune:1; bool nostrictsync:1; /* do not force expensive SMBflush on every sync */ + bool fsc:1; /* enable fscache */ unsigned int rsize; unsigned int wsize; bool sockopt_tcp_nodelay:1; @@ -843,6 +844,9 @@ cifs_parse_mount_options(char *options, /* default to using server inode numbers where available */ vol->server_ino = 1; + /* XXX: default to fsc for testing until mount.cifs pieces are done */ + vol->fsc = 1; + if (!options) return 1; @@ -1332,6 +1336,8 @@ cifs_parse_mount_options(char *options, printk(KERN_WARNING "CIFS: Mount option noac not " "supported. Instead set " "/proc/fs/cifs/LookupCacheEnabled to 0\n"); + } else if (strnicmp(data, "fsc", 3) == 0) { + vol->fsc = true; } else printk(KERN_WARNING "CIFS: Unknown mount option %s\n", data); @@ -2405,6 +2411,8 @@ static void setup_cifs_sb(struct smb_vol cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; if (pvolume_info->dynperm) cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; + if (pvolume_info->fsc) + cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; if (pvolume_info->direct_io) { cFYI(1, "mounting share using direct i/o"); cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; -- To unsubscribe from this list: send the line "unsubscribe linux-cifs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
