From 50dd90bab8745fe88e1e791dd6dfe2d5053c3981 Mon Sep 17 00:00:00 2001 From: "John L. Hammond" Date: Sun, 18 Sep 2016 16:37:09 -0400 Subject: [PATCH] staging: lustre: llite: add LL_LEASE_{RD,WR,UN}LCK Define new constants LL_LEASE_{RD,WR,UN}LCK for use as the argument to and return value from the LL_IOC_{GET,SET}_LEASE ioctls. As arguments, these contants replace the use of F_{RD,WR,UN}LCK from fcntl.h. As return values they replace the use of FMODE_{READ,WRITE} which are internal to the Linux kernel source and not under the control of the Lustre ioctl interface. Signed-off-by: John L. Hammond Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-5013 Reviewed-on: http://review.whamcloud.com/10233 Reviewed-by: Jinshan Xiong Reviewed-by: Lai Siyao Reviewed-by: Oleg Drokin Signed-off-by: James Simmons Signed-off-by: Greg Kroah-Hartman --- .../lustre/lustre/include/lustre/lustre_user.h | 7 +++ drivers/staging/lustre/lustre/llite/file.c | 51 ++++++++++++---------- 2 files changed, 35 insertions(+), 23 deletions(-) diff --git a/drivers/staging/lustre/lustre/include/lustre/lustre_user.h b/drivers/staging/lustre/lustre/include/lustre/lustre_user.h index c69918b..5e907af 100644 --- a/drivers/staging/lustre/lustre/include/lustre/lustre_user.h +++ b/drivers/staging/lustre/lustre/include/lustre/lustre_user.h @@ -246,6 +246,13 @@ struct ost_id { #define LL_IOC_MIGRATE _IOR('f', 247, int) #define LL_IOC_FID2MDTIDX _IOWR('f', 248, struct lu_fid) +/* Lease types for use as arg and return of LL_IOC_{GET,SET}_LEASE ioctl. */ +enum ll_lease_type { + LL_LEASE_RDLCK = 0x1, + LL_LEASE_WRLCK = 0x2, + LL_LEASE_UNLCK = 0x4, +}; + #define LL_STATFS_LMV 1 #define LL_STATFS_LOV 2 #define LL_STATFS_NODELAY 4 diff --git a/drivers/staging/lustre/lustre/llite/file.c b/drivers/staging/lustre/lustre/llite/file.c index bfac6dd..e9791e3 100644 --- a/drivers/staging/lustre/lustre/llite/file.c +++ b/drivers/staging/lustre/lustre/llite/file.c @@ -2245,6 +2245,12 @@ free_hss: return rc; } +static inline long ll_lease_type_from_fmode(fmode_t fmode) +{ + return ((fmode & FMODE_READ) ? LL_LEASE_RDLCK : 0) | + ((fmode & FMODE_WRITE) ? LL_LEASE_WRLCK : 0); +} + static long ll_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { @@ -2449,20 +2455,20 @@ ll_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg) struct ll_inode_info *lli = ll_i2info(inode); struct obd_client_handle *och = NULL; bool lease_broken; - fmode_t mode = 0; + fmode_t fmode; switch (arg) { - case F_WRLCK: + case LL_LEASE_WRLCK: if (!(file->f_mode & FMODE_WRITE)) return -EPERM; - mode = FMODE_WRITE; + fmode = FMODE_WRITE; break; - case F_RDLCK: + case LL_LEASE_RDLCK: if (!(file->f_mode & FMODE_READ)) return -EPERM; - mode = FMODE_READ; + fmode = FMODE_READ; break; - case F_UNLCK: + case LL_LEASE_UNLCK: mutex_lock(&lli->lli_och_mutex); if (fd->fd_lease_och) { och = fd->fd_lease_och; @@ -2470,26 +2476,26 @@ ll_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg) } mutex_unlock(&lli->lli_och_mutex); - if (och) { - mode = och->och_flags & - (FMODE_READ | FMODE_WRITE); - rc = ll_lease_close(och, inode, &lease_broken); - if (rc == 0 && lease_broken) - mode = 0; - } else { - rc = -ENOLCK; - } + if (!och) + return -ENOLCK; - /* return the type of lease or error */ - return rc < 0 ? rc : (int)mode; + fmode = och->och_flags; + rc = ll_lease_close(och, inode, &lease_broken); + if (rc < 0) + return rc; + + if (lease_broken) + fmode = 0; + + return ll_lease_type_from_fmode(fmode); default: return -EINVAL; } - CDEBUG(D_INODE, "Set lease with mode %d\n", mode); + CDEBUG(D_INODE, "Set lease with mode %u\n", fmode); /* apply for lease */ - och = ll_lease_open(inode, file, mode, 0); + och = ll_lease_open(inode, file, fmode, 0); if (IS_ERR(och)) return PTR_ERR(och); @@ -2510,8 +2516,8 @@ ll_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg) case LL_IOC_GET_LEASE: { struct ll_inode_info *lli = ll_i2info(inode); struct ldlm_lock *lock = NULL; + fmode_t fmode = 0; - rc = 0; mutex_lock(&lli->lli_och_mutex); if (fd->fd_lease_och) { struct obd_client_handle *och = fd->fd_lease_och; @@ -2520,14 +2526,13 @@ ll_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg) if (lock) { lock_res_and_lock(lock); if (!ldlm_is_cancel(lock)) - rc = och->och_flags & - (FMODE_READ | FMODE_WRITE); + fmode = och->och_flags; unlock_res_and_lock(lock); LDLM_LOCK_PUT(lock); } } mutex_unlock(&lli->lli_och_mutex); - return rc; + return ll_lease_type_from_fmode(fmode); } case LL_IOC_HSM_IMPORT: { struct hsm_user_import *hui; -- 2.7.4